Specific modulus of Steel is also 25, same as Al alloy and Ti Alloys, so there you go. No more artisan magic carpet ride BS now.
Пікірлер: 1 100
@adamsouthard11553 жыл бұрын
You can watch a few videos from Peak Torque and know more about bikes than watching 200 hours of videos from bike reviewers. Much more useful information than the standard approach.
@pahouseholder3 жыл бұрын
But you need an engineering degree. ;-)
@fuglygolfing2 жыл бұрын
Bike reviewers: "this bike is perfect for on-road, all-road, gravel, XC, DH, commuting, touring, bikepacking etc"
@alexmorgan34353 жыл бұрын
How about black vs red frames? Which colour is stiffer?
3 жыл бұрын
Red is faster
@ngchorguan3 жыл бұрын
Lol perhaps transparent
@polishguywithhardtospellna82273 жыл бұрын
@ Which means it's stiffer, which means it smoothes out chatter better, which means it's lighter, which means higher price tag, which means it fades fast too ;-p ;-p
@MrGarycoww3 жыл бұрын
Blue 🤣🤣
@chapmag65783 жыл бұрын
Apparently there is a branch of enquiry around ‘Colour Psychology ‘ that does indeed indicate that red improves perceived performance......
@PeakTorque3 жыл бұрын
Interesting to read the comments and a few things i didn't mention in the video which are important: Aluminium will likely have larger second moment of area tubes to meet the strength and fatigue requirements (due to having a lower yield and fatigue strength). Thus, the Al bike of equal mass will likely be stiffer due to the second moment of area being higher and having more material volume to play with. I did not address strength or fatigue in the video but its important. For Al frames its normally the driving factor especially near heat affected zones (welds) where the metallurgy changes.
@ccmmrrnn3 жыл бұрын
I enjoyed the video, but isn't this contradicting the point that marketing around Ti frames is bullshit, as the majority of top comments appear to interpret the video as meaning? In the video you hypothetically compared Al and Ti frames of the same mass and tube shapes, saying they wouldn't noticeably differ in stiffness. But that's not how they're designed so that's not the reality of the differences between the frames on the market. It's up to the frame designer(s) to decide what qualities they will best achieve with the material, and there are different things achievable with different materials; particularly, as you stated, when regarding yield and fatigue strength. So the real point is: A frame isn't inherently 'better' because of the material it's made of, but one can be designed 'better' than another by exploiting the material used, depending on what 'better' means to you.
@PeakTorque3 жыл бұрын
@@ccmmrrnn you're dead right and thanks for the comment. I had filmed a cut about in reality how the Al frame would be slightly stiffer and have more 'volume' to work with for the same mass, how the tube shapes would able to be larger to increase I, and reduce the fatigue stress. Im kicking myself for not including now, but it was getting to a bit of a 15min monologue. Not my best work, but there we are.
@ccmmrrnn3 жыл бұрын
@@PeakTorque Appreciate your reply. Note: 'have to' be larger to 'reduce fatigue stress'. Enjoy the clicks from people thinking this is some kind of 'gotcha', which I suspect you intended, given the title.
@fukawitribe3 жыл бұрын
@@ccmmrrnn I was taking the video in very much the 'like for like' comparison of materials, and dealing with some of the 'magic' material properties that people assign to what the frame is from. You're absolutely right that design can follow material, and that will effect the ride and other characteristics - be that complex shaping with composites, or tube constraints with heavy materials like steel - but think some of the key points made were valid.
@toddeyster75573 жыл бұрын
To completely ignore the yield component is quite misleading. Your comparison of many of the factors including the resonant frequency change dramatically when you have a much thicker Al tube at 8KSI vs Ti (3Al-5V) at 79.9KSI or even steel at 36KSI. I do agree with your seat post comment, cheap Al posts act about like bar stock as they are so thick walled, Ti, high end Al or plastic (carbon) all can have a big effect on comfort and perceived ride quality. It would be interesting to see various equivalent bike frames put on a shaker table.
@SheikRusso11 ай бұрын
Just came across your channel and loved it. As a mechanical engineer and lifelong bike rider myself, I was more than happy to finally hear someone making the right considerations about the frame materials and geometry. Thank you and keep it up!
@reneharde345910 ай бұрын
Ditto
@MrJx40008 ай бұрын
The only reason that I ever considered Titanium was for bragging rights, but then I saw the price and said fcuk it.
@SheikRusso8 ай бұрын
@@MrJx4000 it looks awesome, not gonna lie
@kennethstreet78683 жыл бұрын
I never tried to sell a ti bike on material based ride quality, only durability, repairability, asthtetic, and the lack of corrosion. Thanks for the confirmation.
@simonalexandercritchley4393 жыл бұрын
Hi, yes I had a Litespeed Classic (96) in a 57cm,was 1400gm .They do flex around the Bb when you stomp on them,to me they have similar ride qualities to steel but lighter. As you said the best thing about them is corrosion resistance and long fatigue life. Mine was a polished finish,so no paint chip problems,also the surface hardness is very good. This is 3/2.5 ti alloy which is 3% alu & 2.5% vanadium . The Litespeed Ultimate was 6/4 ti alloy ,has more complex shapes and is stiffer.
@johnbodenchuk5143 жыл бұрын
Enjoyed the science. I love my Ti mountain bike (Jones Spaceframe) and completely agree that the seat post and tires have the greatest influence on ride quality. The durability and maintenance of raw titanium is great, no paint to chip and easy to buff out scratches. Also the sound of rocks or gravel bouncing off the down tube is nicer than aluminum.
@K777John3 жыл бұрын
I have a Ti gravel bike and a Ti hardtail 29er-love them both, bought them because as a retired engineer I just love the corrosion resistance and look of titanium. I also have a carbon road bike which I save for the good weather, my gravel bike with road tyres fits the bill as a winter bike. It’s not a ‘magic’ material, I just happen to like it.
@PeakTorque3 жыл бұрын
I like the material too and i think I've been infected. Im probably going to buy one at some point 😃
@SprayIgniteBoom3 жыл бұрын
EXACTLY!!! Glad 2 hear this. Ride what U like b/c U like it. OVERALL fitness is where your BIGGEST speed gains will be had. Adversely ‘older’ isn’t necessarily worse... but style most certainly plays a part in many choices. I am a sucker for polished metals and clear costed cf...🤗😬🥴
@KriKri59803 жыл бұрын
Similar for me. I retired my grey carbon bike for the elegant titanium ride. I could not care less about weight or other hard facts.
@Keith195633 жыл бұрын
I’m the same, I bought my titanium bike because of its corrosion resistance and it looks nice as well not because of the so called carpet ride quality.
@keithevans56673 жыл бұрын
Me too ...Ti is not magic but I do love the material... I do Orthodontics so it's moving dentistry 😉
@kartikeyapanwar3 жыл бұрын
Now this is a reviewer that listens to the ‘community’! I love that you focus on quality over quantity. Looking forward to more videos to make the coming year easier. :)
@rafaeltorres15863 жыл бұрын
All in the ride of the beholder. I own and ride all main bike frames (materials), Ti is my favorite hands down!
@jeffr1193 жыл бұрын
Agreed, I own steel, Al, CF and Ti. The titanium bike convinced me that it is a superior material. Yes it is marginally heavier than my CF bike, but it handles hard bumps in the road much better. Also titanium is much more durable than any CF bike.
@douglasbaumgartner71743 жыл бұрын
@Jeff R I agree, Titanium is a wonderful material for road, gravel, cross and touring bike frames. It's super expensive to build with, and requires absolute precision build quality. But has a great smooth and springy ride. It's not great for high torque frames like full suspension mountain bikes (too much lateral and torsional flex) and aero sprint road bikes (really tough to shape), but otherwise, it's great!
@rcg95733 жыл бұрын
Bullshit! 😆
@twillyspanksyourcakes Жыл бұрын
@@douglasbaumgartner7174 Did you even watch the video?
@twillyspanksyourcakes Жыл бұрын
What you're saying is it's all in your head? Got it
@richardelliott835210 ай бұрын
I really appreciated having all the common opinions about frame materials brought together and analyzed, saved me a lot of thinking in an area I know little about, but hear about often.
@paul.hilton9203 жыл бұрын
I've just bought a Ti bike and I love it! I bought it for a variety of reasons but mostly aesthetics and hopefully durability. Having changed from an Al frame of similar weight it does feel more comfortable but that could be down to several factors such as the Ti bike has dropped seat stays, carbon fibre seat post and it's running 25mm tyres instead of 23's. I can't compare my carbon fibre bike as that's a TT bike and a completely different beast. Of all the bikes I've ridden the Ti one is my favourite though.
@Cortesevasive2 жыл бұрын
No paint is a win win
@R9RealMadridR9CR73 жыл бұрын
I've been waiting for this video from you for the longest time!!! Thank you!!!!!!
@DrJRMCFC3 жыл бұрын
Quality. Very interesting. Brings back all my first year Uni physics
@rrt50003 жыл бұрын
Thank you. I'm a relatively novice when it comes to biking but I have lots of experience with metals and structures. I never understood it when they said a ti bike is stiff yet somehow more forgiving. I still want a ti bike. Mostly for longevity.
@o0260o3 жыл бұрын
I just built up a Ti bike and haven't taken it out yet. Thanks for this, youtube algorithm.
@jackmcandle69553 жыл бұрын
Funny how that happens here in the googlsphere
@kubagajda73473 жыл бұрын
And now you won't have any fun on it whatsoever :P
@samj11853 жыл бұрын
enjoy it. They can have their numbers and their bias. Ti is a smooth ride.
@maxgarely36283 жыл бұрын
Don’t worry dude, you’ll love it. Even if it does not live up to the hype (I think it does) you have a sick looking bike, bragging rights, and your bike will last forever.
@thedistance11553 жыл бұрын
Wait, you have ti bike? I dont... feel lucky bro
@chrisfanning58429 ай бұрын
If I had to guess, it's because the average aluminium bike is much cheaper than the average titanium bike, so it's typically paired with cheaper wheels, cockpit, seatpost, and saddle. There's no point spending £2000 on a titanium frame only to put the same cheap finishing kit on it. Presumably the comfort of high-end wheels and compliant carbon seatposts/bars are often mistakenly attributed to the titanium frame. Plenty of reviewers, vloggers, and bloggers have done enough testing to confirm that tyre and tubes (or lack of tubes) make the lion's share of the difference to ride quality.
@PrinceCbass3 жыл бұрын
Last year I purchased a litespeed gravel. The main reason I chose the gravel was so I could have multiple wheel and tire combos. The biggest difference in ride quality comes from the tires. 25mm tire rides like a log wagon and the 47 mm tires feel much better. The 47mm tires are not as fast but at 60lpsi the ride quality is much more forgiving , traction is confidence inspiring and it looks awesome.
@WildOutdoorLiving3 жыл бұрын
Love the details you’ve put into this video. Keep them coming. I will say though, you’ve essentially just described why all of these myths are usually true, just not for the reasons that are usually claimed. We ride bikes we don’t just ride aluminum or steel or ti as a stand alone material. As you described the different ways these materials tend to be constructed is what leads riders to say they feel one way or another. Their observations are valid even of the don’t know exactly why they are feeling that. I love that you pointed out the difference that components will make to the the feel of a bike because it is huge. We don’t ride frames by themselves after all haha. And as you mentioned different frames of the same materials can feel drastically different.
@robertwalkerdine11783 жыл бұрын
Really honest video, appreciate it mate 👍🏼. Well done, definitely need more of these types of real world experiences
@nateisright3 жыл бұрын
Interesting. My impression of modern bikes, including titanium frames, is that wider tires and modern geometry (slacker head tube angles) have made riding more comfortable on more surfaces. After 25 years of hard work, saving and learning what I like and don’t like, I chose a titanium frame partially because of what it meant to me as a trophy but mostly because of the impeccable build quality. As I’ve gotten older, I have less patience for things like noises and quirks and a titanium frame solved a lot of my complaints about mass production bikes. As they say, “to each, his own.”
@aaron___601411 ай бұрын
This is all silly. Titanium or rather the frameset has almost nothing to do with this. It's wheels, tires, freehub, drivetrain, cable routing, and 2x vs 1x that matter far more.
@DEAR73409 ай бұрын
I live in a region with a hot humid climate. Titanium is the only material that stands up to my sweat. That's enough reason for me. I have owned steel, almunium, and carbon as well. Yes, rinse my bikes after every ride and give them a full wash, weekly.
@larkinkelly37546 ай бұрын
Unless you have a poorly sized press fit bottom bracket on your frame or a carbon frame delaminating/ water bottle bosses falling out etc. Carbon has lightweight and supple characteristics that are desirable, but how many mid 90s litespeed ti and steel frames still ride just like their first day vs only 5 year old carbon.
@leeaprescott2 жыл бұрын
Great work on this. Nice to see someone finally trying to debunk some of the misconceptions that I have to try and educate people on daily. As someone who has designed frames in all of the materials you mention, but who works mainly in steel now I think the one area that is ripe for further content is the impact of tube size, shape and butt profile. One of the reasons Titanium has never really lived up to its promise is the difficulty of tube manipulation, unlike in steel or Aluminium. Id be interested to hear your thoughts. Maybe we should build two steel frames of the same mass but with different tube profiles and see if you can tell the difference...
@truthseeker84832 жыл бұрын
3D printing Titanium will revolutionize frame manufacture
@veloatelier61222 жыл бұрын
@@truthseeker8483 already has. Check out our bastion frames and components on our website.
@Jin_KX3 жыл бұрын
Thanks for confirming what I've always thought and experienced about what gives you comfort. Wider tyres with lower pressure and in my opinion, also a 27.2mm round seat post since tube diameter is also a contributing factor. Been running 22m Continental GP4000 tyres at 120psi for years and was shocked at what a big difference I experienced when I first rode on 25mm tyres at 90 - 100PSI.
@chapmag65783 жыл бұрын
Exactly my experience on my Litespeed .
@chesterthomas50932 жыл бұрын
Try 32’s in the mid 50’s
@Megadeth66333 жыл бұрын
the best thing to happen to cycling on youtube, peak torque.
@robertp72093 жыл бұрын
Hambini my vote is with 😁😁
@Primoz.r3 жыл бұрын
Hambini is a bit too raw and vulgar, guessing part of it is for the sake of it. This is much more calm and straight to the fact.
@robertp72093 жыл бұрын
@@Primoz.r - he’s 5 yrs old, what do you expect 😂🤣😂🤣😁.
@deneystanna21103 жыл бұрын
The best review ever
@Megadeth66333 жыл бұрын
@@Primoz.r Totally, I mean it's comical but 30 straight minutes of hambini acting like a child is a bit jarring. There is also the fact that he usually reviews faulty frames that people actually send to him because they are faulty in the first place. Nevertheless he's a good educator when he's serious
@Mamilian3 жыл бұрын
Thanks for that! I recently destroyed my 1550g Al gravel frame, and replaced it with a 2050g Ti frame, swapping all the components over (group/wheels/bars/etc), and noticed that the Ti frame has less "chatter" from the trail. If I'm understanding your comments correctly, this is likely to be an artifact of the increased weight of the frame (and potentially a different seatpost)? Cheers
@samreynolds5694 Жыл бұрын
Great piece. Despite it not being the "wonder material" overall, it does have one other advantage not mentioned. It's extremely durable, i.e., resistant to dings and dents. Aluminum and carbon are susceptible to dents and chips respectively. It's certainly a lifetime material where as aluminum and carbon are not. But now I have more to chew on in my search for a new gravel bike. So, thanks for making my choice more difficult! 😉 👍
@PRH1238 ай бұрын
There’s myths out there about aluminum as well. The assumption that stress accumulates over time leading to inevitable breakage for example. Doesn’t seem to be the case with bicycles. I’ve had 3 aluminum bikes for 15+ years, no chips, no dents, all signs are they will last as long as steel…
@michaelupchurch37796 ай бұрын
Carbon frames become flexier with time compared to Ti steel or aluminum so I would say Ti is superior if you look at companies like Moots there superior
@25timstevens2 жыл бұрын
I have a Dolan titanium ADX frame and it is beautiful to look at, but I agree that a carbon seatpost is huge when it comes to this. I watched one of your older videos where you talked about the cheapo FSA handlebar. I bought one for about 30 euros and it is amazing, I love it!
@kevinfrost15793 жыл бұрын
Thanks PT great informative videos based on engineering realities, refreshing alternative to those marketing unicorns. Hugely enjoyable and always interesting seeing the wide variety of views they elicit. For riders thinking of a change of frame material ...... IMHO test as many bikes as possible by actually riding them and remembering .....(1) wheel build/ tyres/ seat post have significant impact on noticeable feel ....(2) Everyone has their own subjective arse. 😇. So ride it because you like it. 😁
@boulholaerocycles3 жыл бұрын
As a bike manufacturer, I couldn't agree more with this video. Very well said, sir.
@carpediemarts7055 ай бұрын
Who do you build for?
@julmeissonnier3 жыл бұрын
You are absolutely right, my 1998 Litespeed Vortex at 1280 grams of relatively small diameter tubing and 1" fork steerer had the magical flying carpet legendary Titanium ride, my 2019 custom titanium frame at 1650 grams with big tapered head tube (1 1/8 - 1 1/2), and a 42mm downtube feels a lot like a stiff modern carbon frame that weighs 1000 grams...
@ralphc140510 ай бұрын
I remember Ti being the metal of the future back in the 90s for road bike frames. What ever happened to that???
@adamkubiak19333 жыл бұрын
Thank you. This clip earned you my sub. My experience is that people should look for frames that accommodate wider tires (at least 28c), when looking for comfort and speed rather than specific material.
@dh73143 жыл бұрын
This video was truly fascinating, thanks
@johnfarren42473 жыл бұрын
Thanks for doing this video. To me the construction of the fork and it's inherent flex and and the tire sizes and pressures used make the most difference, especially when when a long and flexible seat post is not part of the equation. One can see fork and tire flex when riding. I have high end carbon, titanium, aluminum and steel road bikes made from 1971 to 2008. The material makes almost zero difference to the ride quality for me, but what is noticeable is the sound the bikes have when hitting bumps. Let's face it, brands have to sell new bikes and they have come up with marketing "facts" to sell them. For me, my go to everyday bike is a 1994 Litespeed, as the durability of it the best and there is no paint to scratch or corrosion to worry about and I still do PR's on it.
@TheRampax3 жыл бұрын
As I have gotten older I have come to desire comfort above other things on a bike. It's definitely true that the industries recent shift toward fatter tyres has had a far more significant impact on general ride comfort than frame materials.
@Incaensio3 жыл бұрын
just as I'm about to argue, you throw a note on the screen. 😂
@wintermetalhdАй бұрын
Youngs modulus and corrosion resistance were the two specifics I was wondering about. Thank you for the in-depth answer that so many skip over! I love my 20 year old Aluminum Specialized Allez but it seems like no one has found a good way to make paint to stick to Aluminum for more than 20 years or so.
@timocallaghan44083 жыл бұрын
I would love to see a follow up on the impact of hydroforming aluminium when both main factors are constant, in terms of stiffness in certain axes vs. compliance in others
@timocallaghan44083 жыл бұрын
@Newtube k
@timocallaghan44083 жыл бұрын
@Newtube I simply want to learn about it but thanks
@edam94613 жыл бұрын
I think most people mix up the great feeling of their first custom bike (if their builder was good) with it being a magical property of Ti. All down to the quality of the builder and their understanding your needs, or not for mass produced bikes.
@philallan66853 жыл бұрын
Top class nerdery there m'boy! Couldn't understand it, but love it. I've a custom made Ti frame - it's fabulous, but you're right, the magic carpet ride comes from 26mm Turbo Cottons with latex tubes, not Ti tubes. Nice Litespeed though.
@Slow.Smooth3 жыл бұрын
Please more content! I work at shop and its hard to get people to understand that buying an aluminum bike and just getting carbon wheels is a great way of going about getting the "feel" theyre looking for. Considering they'll save a significant amount of money
@jotcarey Жыл бұрын
Carbon wheels (or wheels built with any material, really) giving a different "feel" from other wheels is just as much a myth as the titanium bike myths.
@kkkwwwaaakkk3 жыл бұрын
The Vittoria Corsa Control tyres can make any bike feel good
@nickjohnson7103 жыл бұрын
Your right ,I got some in 25mm but they measure 27mm .....they feel great, comfortable, and feel super fast 👌I had veloflex corsa in 25mm before which were not good at all!!! Lots of punctures, the ride quality was awful even with latex inner tubes in 🤷♂️ they have improved there tyre line up now
@robertp72093 жыл бұрын
Seems that a carbon fork provides a huge contribution to “comfort”.
@Varaxis3 жыл бұрын
I like the springy side-to-side flex at the BB. Makes climbing hurt my joints (e.g. knees) less, and makes my heart the limiter rather than the body. The frame gives, instead of my joints, and that flex is returned to the drivetrain as propulsion (see GCN "are you faster on a stiffer bike" vid) during my dead stroke. That's the smoothness I feel. Feels like steel tubing consistently gets the just-right amount of flex that I've grown accustomed to.
@seanmccuen6970 Жыл бұрын
there's no propulsion from the frame flex. but if you like the softness, it's all good.
@danm92972 жыл бұрын
This was super interesting and very informative. I was tempted by titanium so I'm glad I watched this! Thanks for your work.
@chris1275cc2 жыл бұрын
Don't be put off by this, its good explanation of why some of the marketing from bike manufacturers (and marketing in general) should be taken with a grain of salt, but speak to some Ti owners who have ridden other materials at similar price points/levels. There is a reason the vast majority of us end up preferring Ti that can't be quantified by simply looking at material properties.
@finarollerz3 жыл бұрын
My input, I have 2 steel Pegorretti’s, A steel Salsa and a Moots RSL, I have had a carbon tarmac and 2 Aluminum frames, so I feel like I have pretty good experience. If I had to choose just one it would be the Moots hands down! Now don’t get my wrong, as you can see, I love steel bikes, but I look at the Moots as a Swiss Army knife, it does it all well and doesn’t rust! Edit- so I just got a steel gravel bike, it has 38c tires MASSIVE difference, talk about frames all you want but big supple tires rock!
@KeithHeinrich9 ай бұрын
My thoughts as well. I have a vintage steel fleet, an aluminium framed gravel bike and a vintage carbon bike. Wheels, tires and tire pressure make the most difference to the ride quality. I use hand built wheels as well which also improves ride quality and performance. I can say this without any doubt. So while frame material is part of the ride quality equation it’s not the whole answer.
@finarollerz9 ай бұрын
@@KeithHeinrich recent Ronnie romance Doc says it’s every except the frame. 😂
@KeithHeinrich9 ай бұрын
@@finarollerz Frame is a starting point. If it was the only thing folks would never upgrade wheels, tires handlebar tape and so on. Case study, hi mod carbon frame on 23mm tires and mavic wheels vs 26mm rubber at lower pressure on wider custom wheels is a night and day experience in ride quality and handling. Same frame. And same deal across all the bikes. Frame is a starting point. Much better with better wheels and tires.
@Ditypo3 жыл бұрын
after watching this video and riding with a clubmate who rides a Ti bike in the group ride me: im about to end this mans whole career
@twillyspanksyourcakes Жыл бұрын
Any update? 😂
@grazryan3 жыл бұрын
You know that you’re on a different level of cycling enthusiasm when you reach this point. 😂 great Info!
@paulbrice11883 жыл бұрын
Agree with all you said , & great to see proper engineering basis vz seat of pants opinions around frames...keep it coming ! From my experience 'Durability' and 'fatigue resistance' are also tricky terms given how many factors affect them beyond the base material properties, - I've had two TI frame failures with cracks & two carbon frames badly deteriorated with alloy corrosion leaching into carbon at 'joints'
@LS1conehead2 жыл бұрын
IF that alloy leaching was a problem, just imagine what will happen when those (soon to be the only way carbon bikes will be sold, if the manufacturer trends keep up like they are) all internal brake lines filled with corrosive brake fluid start leaking into those same carbon frames, even if they are internally gel coated (I'm guessing most are not, anyway??). The sharp bends required to be hidden internally, especially near the head tube/stem even help contribute to the brake lines cracking, wearing through, and rupturing. :( NOT a good design, in my honest opinion at least.
@basedgodstrugglin3 жыл бұрын
Was that your American voice at the end? If so it’s spot on 😂😂😂
@appa609 Жыл бұрын
HSS actually has a specific modulus similar to aluminium and titanium. Al frames can be built lighter than steel. The torsional stiffness of a bike frame is basically determined by the GJ of the top tube and down tube, and this is mostly controlled tube diameter. For the same amount of material, the linear static theory tells you it is better to distribute it on as large a diameter as possible. This breaks down at the point where the tube is so thin that it is at risk of shell buckling, and this tends to happen at a fixed thickness/diameter ratio. Aluminium is much less dense than steel, which means a given sectional density can produce much larger diameter tubes before buckling. For the same reason, optimally designed Al frames will be lighter than Ti frames. I work in composite structures, and there are some specific applications where balsa wood or styrofoam produce stiffer and stronger structures than carbon fiber at the same weight, for basically the same reason.
@ryans62808 ай бұрын
This is really interesting! Do you have any example of the Styrofoam/balsa structures I'm curious.
@obscurazone Жыл бұрын
Great video! I've always wanted a Titanium frame ever since my cousin got a Merlin back in the 90s - it just looked so incredibly beautiful and was so lightweight but also agile? Nimble on its toes and responsive! I guess that is what we could call stiffness? (I always get confused by what people mean). There's also the huge appeal of custom geometry and fit - that's the main appeal for me really. Having a Titanium bike built in America or Italy though (as opposed to a much cheaper Asian build) isn't an option, so the next best option for me then is good old steel. It's great to watch this video and understand that a metal frame with similar tubing layout and weight is going to result in a frame that is more or less the same in "stiffness" to titanium. A custom steel frame will have all the same simplicity and aesthetic qualities as titanium, but will be cheaper than a quality Titanium equivalent. I've been sat on the fence for ages, and I think this video just made my mind up so thanks!
@lechprotean3 жыл бұрын
I was considering Ti frame and kind of knew that the 'magic carpet ride' thing was bs, thanks for spelling it out. CF has a lot more flexibility to create shapes that are needed, so I was able to get a frame that can accommodate much wider tyres (in my gravel bike) that any Ti frame I could get, not to mention the CF is way lighter.
@lechprotean11 ай бұрын
an update from the future - I have been riding the CF frame in rough terrain for 4 years now and it's all good, no durability problems or cracks etc. I'm reasonably happy that I went with CF, but given that I have n+1 bikes by now, I'd totally consider a Ti gravel bike as I ride fairly narrow tyres on my gravel now (for worse terrain I have MTB)
@Cerv3ra3 жыл бұрын
Aluminium Defy frame is prolly my endgame then, at least for a good time. Thanks for the info
@alexsharifi7423 жыл бұрын
My mountain bike and road bike are Ti, for the simple reason that I wanted a "lifetime" frame (basically I wanted it to be the last frame I ever bought etc...). I'm 99% sure that I actually hadn't given thought to stiffness or ride quality. As a Gen X'er, I just think Ti was that bad ass super alloy that was part of the space race. Growing up during the middle of the cold war, the X-15 and SR-71 was mind blowing, as such Ti was just that cool exotic material. I just bought Ti cause it just looked cool and it was the material that made amazing things happen when I was a kid. IMHO, if someone is obsessed with performance figures and wants the latest and greatest, they should just by the latest and greatest Al frame every other year (or a carbon frame if you've got deep pockets).
@the_minimalistic_adventure2 жыл бұрын
This is a late comment, but this is my exact thoughts on titanium frames. A good quality Ti frame can definitely be a lifetime ride, which is why I just spent $7k on Pilot Cycles Scram Pinion bike. It’s a lot of money, but it should last me my entire life! I’m not too stressed about ride quality, I just wanted that titanium “look” and durability.
@pierrex3226 Жыл бұрын
Chinese carbon got cheap.
@username8644 Жыл бұрын
Carbon frames to me are not durable at all. I think Al frames are still pretty damn durable. I still ride a Caad7 from 2003 that has a LOT of miles on it and it still works great, shows no sign of wear (has a dent on the main tube from a crash, which would have meant the end of the frame if it was carbon). That was my grandfather's bike, my bike is a 2018 specialized allez sprint comp because it was by far the best value bike on the market at the time. I expect it to last a really long time, even though it's an Al frame. Titanium is ideal, I agree, but way out of budget. I don't understand why people think Al doesn't last long, it easily can last 20-30 years.
@stuartdryer13523 жыл бұрын
I was very curious about this. Thanks for a rigorous explanation.
@petee19683 жыл бұрын
This was so geeky it was wonderful! Thanks for the facts. FWIW, I still intend to buy a titanium frame, purely because I love the way it looks.
@LordAus1233 жыл бұрын
This is a huge win for the “steel is real” guys, amirite
@danielbum9123 жыл бұрын
Speaking of which I got curious and 210 GPa / 8 g/cm^3 sure enough is 26.something again.
@samj11853 жыл бұрын
My Ti rides easy smoother than my steel but those are a small sample.
@adamholcombe88473 жыл бұрын
Its more like "steel is really the same as titanium but cheaper"
@coldforgedcowboy3 жыл бұрын
Of all the frame materials to build a frame from steel is the worst because it rusts and work hardens.
@samj11853 жыл бұрын
@@adamholcombe8847 except for being generally heavier and prone to corrosion, sure, I guess
@barrymonaghan65933 жыл бұрын
What are the pros and cons of stainless steel frames? Thanks for the excellent video.
@2WheelsGood.013 жыл бұрын
They look cool polished, they don't corrode and can be easily recycled, that's about it. Like he says, the material doesn't matter too much, it's the shape of the tubes and bike geometry.
@aldrinclementina42973 жыл бұрын
Hi there. I've watched this video several times. I like the content. I love titanium bikes. I always wanted one as much o wanted a carbon bike back in the days when I was younger. Now I own a full carbon bike. But after seeing watching this, I will definitely build my aluminum frame /carbon fork up. I will build it with DA 7800. I will try to build a sub 8kg bike. Thanks for sharing man.
@mff5133 жыл бұрын
Hey I see you're good at FEM analysis, could you do a vibration/modal analysis of different frame types ie dropped/ normal stays and different materials ie alu and Ti thatd maybe help dispell some of the myths around material and show that it is more dependent on geometry/tubing
@PeakTorque3 жыл бұрын
Not a bad idea that. Got to find the time!
@9psi3 жыл бұрын
Add curved stays and floating stays to the mix
@mff5133 жыл бұрын
@@PeakTorque yeah its fairly time intensive, I've thankfully already got a frame designed using standard round tubing with no butting and standard seat stays made from steel on ABAQUS. I would need to change the materials and design a dropped seat stay version and run simualtions for each iteration. I could post the results after I've finished exams and had the time to do it
@philso78723 жыл бұрын
@@PeakTorque what calculator app are you using on your smartphone? Thanks for posting a video with some real engineering justifications vs pseudoscience and buzzwords.
@SamanthaBep3 жыл бұрын
But how will bike companies massively inflate the value of their products if they sell bikes based on facts and not bullshit from marketing from the cycling "journalist" industry
@TheNeelonRokk3 жыл бұрын
They almost all did by 10-15% "due to covid-related supply issues", which is layman's terms basically is translated from, more demand minus the same stock sizes equals more profit for the same effort.
@luis.sordi.3 жыл бұрын
I think most industries market their products with bulshit that most people don't understand. And bicycle prices also have a big problem caused by how the sport is funded, basically from sponsorship, making their marketing budget heavy on the price of the products. And it is such an old model that I question their ROI and if that money should be better spend otherwise.
@tewaewae3 жыл бұрын
Hasn't stopped car, coffee, food, fashion and 100 other product line manufacturers Why would you expect bikes to be different?
@coldforgedcowboy3 жыл бұрын
They will inflate the value of their products by changing the wheel size and destandardizing all the parts so you can't get replacements parts after five years.
@cccpkingu3 жыл бұрын
By working hard and not outsourcing their stuff.
@valentinlebeaupain43993 жыл бұрын
First of all, thanks for the great content ! Most of the time stiffness (especially in the bottom bracket area) is advertised a key factor in bicycle performance. However some people contest this vision and even state that some lateral compliance is beneficial for performance for the vast majority of cyclists (some guys in a magazine even talked about "planning" to name the characteristic of lesser stiff frames deflecting along with pedal strokes). As a guy with no engineering background I can't seem to wrap my head around this question as I found mostly unsupported claims, or dubious marketing statements. So, is lateral stiffness around BB a key factor for performance ? And to which extent ? If this subject is addressed in one of your video (or elsewhere) I would be really eager to have these informations. Cheers !
@teamjdb3 жыл бұрын
Hi, great video. Have you made anything regarding the virtues of bicycle frame stiffness? Particularly with regard to the overall efficiency of torque transfer from chainring to wheel over a number of revolutions, I would be very interested to know whether a less stiff frame material resulted in any net power losses.
@briank413410 ай бұрын
Just found this video. I have my first ever titanium bike. I love the ride, sure, but as a mechanical engineer, I was pretty skeptical about the "magic ride" claims. And a year after owning it, no there is no magic ride. However, it made a lot of sense for a mountain bike due to the fact that I don't have to worry about paint chipping and rust. I think people convince themselves that titanium has a superior ride due to the high price, the rarity, the name, and the fact that there is a popular song named after it. As far as ride quality, I find that I still prefer high-end steel. I think it's because of the ultra-thin tubing walls, which make for a nice resonance and sound that I don't get from other materials.
@phildo873 жыл бұрын
If you want a source to look at ride comfort you should look into the research in titanium vs aluminum wheel chairs since it's a medical device they did serious research on it. The findings where that aluminum is a better vibration dampening material but the difference is only noticable in instrumentation. When they tested it with people there was no difference in feel. However separating the parts with polymer materials acted as vibration dampening for the chair. I suspect the better feel is from the fact that usually titanium bikes use more carbon parts than aluminum bikes and the carbon is responsible for the vibration dampening.
@playmoreguitar53932 жыл бұрын
I had an aluminium fork on my steel gravel bike and recently changed to a Enve Carbon fork and I find the carbon fork much hasher. Go figure. Nothing else changed so I don't know what to believe
@barrymichaelmullins56913 жыл бұрын
This is brilliant. Can you do a vid on different Ti frames (companies, grade 5 vs 9, price) and aerodynamics? Fantastic stuff.
@TheLelol3 жыл бұрын
Thank you! Telling facts about material and dimensional properties on bike design is rare on youtube!
@sasha3713 жыл бұрын
the difference in price at the end 😁
@sylvainmichaud22623 жыл бұрын
People want to feel unique but part of a group at the same time. People underestimate how many of their choices will be influenced by the predominance of one over the other and the "noise" created by marketing. "Buy titanium. You will be uniquely different !" "Buy carbon. You will be part of the elite" "Buy aluminum. You will be part of the performers that are Savvy with their money and you will be different" The funny thing is that very few people buy a product based on their real needs/use case and their physical attributes/performance level. Generally speaking, as George Carlin said : "people buy things they don't need at a price they can't pay to impress people they don't like."
@VC305773 жыл бұрын
What would you buy? I want to be in your group 🤙
@sylvainmichaud22623 жыл бұрын
@@VC30577 “I don’t want to belong to any club that would accept me as one of its members.” Groucho Marx
@Amphibax3 жыл бұрын
I would buy a aluminium bike just because I'm not willing to spend that of money
@chapmag65783 жыл бұрын
....and now add your choice of group set for a little more complexity in the decision making .....
@sylvainmichaud22623 жыл бұрын
@@Amphibax A Saavy performant cyclist ! 😉👍
@JimKJeffries3 жыл бұрын
I love hearing truth. Thanks so much for a wonderfully informative video. Ride on.
@larsfrandsen2501 Жыл бұрын
Finally! You confirmed what I thought I knew already from my own practical experience. I travel with a Titanium bike because it is indestructible. I have a CAAD 10 for the same reason. Both metals are ok for stiffness and comfort. I like the naked Titanium look. But that’s it. And it’s enough. Thanks for this and other videos like it.
@jimc17043 жыл бұрын
What about specific Strength? (not to be confused with Stiffness) Giving the smaller second moment of area of Ti tubing most likely means the maximum distance from the centroid will also be less hence less stress for the same given bending load, combined that with the higher material yield strength of Ti means a Ti tubing will have higher strength and larger deformation at failure compare to one made from Al. Translate this into bike frame design, yes you CAN design a AL and a Ti frame that has the same stiffness, Ti CAN however allow for less stiffness (more compliance/comfort in marketing terms) for a giving strength requirement and that is desirable if comfort is what you want to maximize. Nevertheless, You can of course get a comfortable Al or a harsh Ti frame, other factors are also important.
@Hiasibua3 жыл бұрын
Great video, informative and well structured. Audio was also nice and uniform ;-) I do have a thought to share, a question left to answer, though. With Ti having more strength and being the denser material than Al, one would need to construct a frame out of tubes that are either scaled down (in the cross-section, not length ofc) or have thinner walls. (or combination in between, whatever) That way the resulting trusts has about the same strength and mass. But wouldn't those smaller tubes make the frame more flexible/less stiff in bending around the longitudinal as well as the vertical axis?
@Hiasibua3 жыл бұрын
I hope this is understandable. I am neither a mechanical engineer. Only sat in "Mechanik 1" course, because every student in Germany has to have heard Mechanik 1 at some point! :-) Yeah... Electrical engineering and I quit
@tiagommvs3 жыл бұрын
If he had mentioned that in the video, he wouldn't be able to make his point. Not very scientific...
@yann-alexandresoubai1153 жыл бұрын
Thank you for this enlightening video. At the end you say your frame is too light for your height and weight. Could you explain again which "ratio" is the right one? Maybe it corresponds to the other marketing race at the lightest?
@jamessilva28743 жыл бұрын
Thank you so much for sharing this!!
@mosca32893 жыл бұрын
Came for the bikes, stayed for the engineering.
@geraintroberts66063 жыл бұрын
You can probably make that frame bit more comfy buy having curved seat stays instead of straight so you can let the chainstay flex more, plus curved front forks instead of straight.
@randalbladel28179 ай бұрын
Given the same steering tube angle and relative position of the axle to the crown, a straight blade fork can be made to flex as much as a fork with curved blades. the flex will be more up at the crown itself, and the force from the road bump through the wheel axle to the fork will have a longer lever arm to flex the larger section crown, while in curved blade forks the flex will occurs more at the lower end of the fork, where there is less cross sectional area but also much less of a lever arm. Don’t get me wrong; I prefer the aesthetics of a curved bladed fork, especially a steel one with a lugged crown, but that’s because I’m an old retro-grouch.
@benjaminurzua81003 жыл бұрын
Thank you. Could be possible a future video on cornering grip between 23-28 mm tires?
@Solarsystem503 жыл бұрын
Great video. Would you make a video about differences between aluminium frames? I would like to know the science behind why a frame goes for $$$ and another one is only $. Thank you
@Velofil3 жыл бұрын
I ride many (6) different Titanium Bikes and there are huge differences in the ride feel between them. A REWEL with a seat stay shaped like a Pinarello feels like a fully. A MORATI with a straight seat stay rides like a KLEIN. The main reason why I have Titanium Bikes is not because of the magic carpet BS but the durability and the look.
@jev28673 жыл бұрын
There are certain characteristics for each materials, to where they are built differently. Strength to weight ratio, weight/thickness to stiffness ratio etc.. Crunching numbers to justify the "The same" argument is kind of asinine. I mean in that sense anything can be made equal.
@RedmercyGG3 жыл бұрын
But the look depends on the paint...
@aaronnorman79073 жыл бұрын
@@RedmercyGG The look is in the lack of paint.
@antonhelsgaun3 жыл бұрын
@@aaronnorman7907 and the thin tubes
@I3ene13 жыл бұрын
Do you own a rewe? You think the seatstays are that good? Im planning my TI custom bike atm and im looking for the most comfortable seatstay design
@Amando888883 жыл бұрын
Since the main bulk of the comfort or compliance comes from the seatpost, how would a Ti-Carbon bike feel then? Ex: Bastion or Curve Belgie Air. They're marketed as combining the best of both worlds but would we just be getting a Ti bike that has it's compliance ruined by the stiff carbon that's been added into the mix? What do you think?
@valiantabello3 жыл бұрын
This is a brilliant question
@Primoz.r3 жыл бұрын
Excellent no nonsense video. Straight to the point, factual. The sad thing is, yeah, Ti and Al are roughly the same. But so is steel. And Allite's Supermagnesium is just below that (~24). So no magic bullet. Unless... Be!
@PeakTorque3 жыл бұрын
AlBeMet bikes....one day!
@Primoz.r3 жыл бұрын
Sadly it looks to be quite toxic as well, though not as much as straight beryllium...
@jonstreet14983 жыл бұрын
Awesome video. Well done 👍🏻
@TPS25253 жыл бұрын
Love my Ti bike, sold my Alu bike shortly after it arrived.
@chapmag65783 жыл бұрын
Love my 2004 Litespeed Tuscany, as it fits me so well. I understand the Young’s Modulus and shape argument . This is born out by simply replacing the 21 mm tyres with a 25 mm tyres or changing out the wheels.....they make a huge difference to the ride quality on the same frame . Still, we don’t want to get into a digital vs analogue music argument then do we :)
@tobycolin62713 жыл бұрын
Tyres, wheel seat post, handle bars all affect the compliance/ comfort of the a bike. The trouble is now disc brakes accept wide tyres so they can be supplied to the “influencers “ in a spec to make the characteristics fit the press release. Modern disc bikes have all the equipment to make them compliant flexing seat posts, carbon one piece bars and shallow wheels. If you pop 60 deep section wheels, 23 mm tyres, alloy post and bars you’ll see how harsh a modern disc frame is.
@garthh44853 жыл бұрын
Yep, my 2003 Airborne with 25mm and 2014 Ultegra 6800 was a nice step up from the 03 version, but doesn't hold a candle to the upgrade to my 2020 T-Lab. Unique tube shapes make for a very stiff front triangle, with the rear triangle having that all familiar ti ride.
@kohli123 жыл бұрын
Id love to see a video that relates to your engineering background in sailing AND cycling! As you I am a sailor who fell in love with cycling...:)
@shadyss96 Жыл бұрын
Thank you for this video. I've always wanted a ti bike for all the marketing bs that I could be enjoying but this helped put in reality.
@coldforgedcowboy3 жыл бұрын
@Peak Torque... Can you talk about Carbon vs Aluminum rims; weight, stiffness, & price?
@MrGarycoww3 жыл бұрын
I went from custom 32mm dt swiss aluminum rims with dt swiss aero comp spokes on hope rs4 straight pull hubs to 60mm prime black edition carbon rims with the same spokes and hubs and the ride quality is better , but I did change from gp4000 28mm to 26mm specialized turbo tires as well so maybe they were making a huge difference. 😃,overall though they feel way smoother than the aluminum rims.
@coldforgedcowboy3 жыл бұрын
@@MrGarycoww ... Bianchi has been using vibration damping technology in their frames for a while now. Have a look. kzfaq.info/get/bejne/aL2cpbiKz7Wmfps.html
@MrGarycoww3 жыл бұрын
@@coldforgedcowboy a bit like specialized zertz ?
@coldforgedcowboy3 жыл бұрын
@@MrGarycoww ... Similar but different in that with the Contervail system the vibration damping is built into the adhesive and a layer of specail composite, so it would be ideal for composite rims. www.compositesworld.com/articles/countervail-vibration-canceling-composite-technology
@mit19783 жыл бұрын
Alu rims never more stiffer than true carbon rims, but here talk about more facts...hubs and spokes. Its not enough to have just a good carbon rim.
@chuckhancock58053 жыл бұрын
I'm wondering what seatpost you have on the litespeed in the video. It looks like it might have a bit of flex
@chesterthomas50932 жыл бұрын
Any seatpost would have flex with that length
@6872elpado3 жыл бұрын
Nice video, I'm glad youtube recommended to me.. I have a question.. If Ti is marketed as buttery smooth it means it is more compliant? Which means it is less stiff? So then why would you want a stiffer frame? Do people prefer stiffer frame or compliance from Ti? I mean in the marketing terms..
@MrGarycoww3 жыл бұрын
Great factual information! I do like the plus points of it ,fatigue life, looks ect. I agree too that from my modest experience the biggest change i had was having custom wheels,hubs,specialized turbo tires ,made my 2014 roubaix feel amazing from standard 😀👍
@andrewnorris54153 жыл бұрын
Agreed, the Ti ride is no better than a steel bike. Glad you corrected yourself in the pinned comment. No amount of quoting technical terms - can hide that you missed crucial data. The simple fact is that ali frames have to be made stiffer - as they can handle far less flex. Stronger materials like heat treated-steel (e.g. 853) - are usually built to make more comfortable bikes with more flex - as the frame can take that flex repeatedly without failing. Standard cro-mo steel cannot do that. So yes, with young's modulus, you could, in theory, build a bike out of the same types of steel - with all the same wall thickness etc. But the lower grade steel would not be able to take the flex, esp. if it was an mtb with a heavy rider for example. Sorry, but your original video just missed the key points - and hide it in a lot of tech terms that made it sound like you knew what you were talking about. One can feel a quality steel frame flex as put on the power. Frames do flex! Agreed the seatpost often makes the most difference. Esp. a cheap compared to an expensive one. But frames matter too. Over the past three decades, I have built up and ridden many.
@chrisblacklock94683 жыл бұрын
I'd love to see a similar one about steel. Is vibration absorption or springyness real, or just marketer's bs?
@TheGotoGeek3 жыл бұрын
It’s BS. The big advantage of steel is that it’s easier to work with, especially for a small custom builder, so you can get exactly the geometry you want. It’s also much better for custom forks. If you’re like me and enjoy riding low-trail frames, steel is the only way you can get that. Ok, steel fork with a Ti frame would work, too. But other than that, damping is the same for both (nonexistent) and springiness is essentially the same.
@rcg95733 жыл бұрын
BS that has been spoon fed to consumers of boutique steel and ti frames for decades, and has now trickled down to the non boutique steel frame consumers. Same BS as the “springy smooth” titanium ride BS claims. Reminds me of all the goofballs, who claimed their silly priced Pegoretti Marcellos and Big Leg Emma's were smooth riding because they were made of steel. Some of the stiffest and most bone jarring frames ever made. Boonen rode one to his TDF Green jersey win in 2007, and even he conceded it was an incredibly harsh riding frame, but great for the sprints. People easily programmed by marketing BS will regurgitate any nonsense spoon fed to them that makes them feel warm and fuzzy about their purchase decisions. Happens in almost every industry. 😆
@MrScrofulous Жыл бұрын
The steel bike will likely (though not necessarily) have more mass and more comfortable geometry.
@albinpopot86313 жыл бұрын
Thanks for the videos on EI. very interesting. I'm still wondering why it's more confortable to have a carbon fork & seatpost > better compression elasticity of the materials aborb the chocs ? Thanks for the headsup. Albin.
@timwalsh31578 ай бұрын
The design of the bike has more to do with the "feel" of the bike than materials used. Over the past few decades, I have been fortunate in having a wife who has been tolerant of my spending habits regarding bikes. So, I have had road bikes in steel, carbon, aluminum and titanium. I still have carbon and titanium road bikes in the garage. The titanium is still my go to bike for half and full centuries. The design and materials make it efficient and compliant, much more so than a bike of any other material or design. I understand your preoccupation with numbers, but would suggest long test rides are a better measure of bike feel.
@alancalvitti3 жыл бұрын
@5:35 but the difference in dynamic damping b/w nylon vs metal guitar string tuned to the same pitch is measurable and audible - they dampen the input energy differently
@rcg95733 жыл бұрын
Yeah, and titanium alloys have a lower frequency loss factor versus aluminum alloys which is why ti is an inferior vibration dampener versus aluminum. This has been proven in numerous laboratory tests. This is why high end audio component manufacturers like Dynever, McIntosh, etc.... use aluminum alloys to dampen unwanted component generated and environmental vibrations, not titanium. They are not using the aluminum to save money. They are using it because it has the metallurgical trait of being a superior vibration dampener versus other alloys including titanium based alloys. That’s why it’s always a good laugh to listen to the “my ti ride dampens the high frequency vibrations so well” bullshit claims. At least they provide some good comedic relief with their BS ti vibration claims, and that does serve a purpose. 😆
@kovie91626 ай бұрын
@@rcg9573 People say that Ti dampens vibrations better but what they really mean is that it modulates and transmits vibrations in a more pleasant manner than aluminum. You're still going to feel the vibrations. They're just going be smoother and more pleasant than with aluminum. It's like hard vs soft rubber bushings on a car's suspension contact points. The former will be harsh while the latter not, but both will transmit road vibrations to the passengers. It's not the degree of damping but the type.
@andrewpease36883 жыл бұрын
The "zingy carbon frame" thing is also marketing BS, with composites you can have whatever you want by changing the fibre orientation, material type, etc.
@ccmmrrnn3 жыл бұрын
Well...exactly? You're correct that a frame being made of carbon fibre composites doesn't inherently make it 'zingy', but the use of those materials allows a capable engineer to create a stiffer and lighter frame than they might with other materials, i.e. 'zingy'. It's only marketing BS if it's a poorly engineered frame.
@andrewpease36883 жыл бұрын
@@ccmmrrnn what I am saying is that there is nothing to stop you designing a nice soft and lightweight carbon frame, a really stiff one or anything in between.
@ccmmrrnn3 жыл бұрын
@@andrewpease3688 Cool, we agree! Thanks Andrew.
@Slow.Smooth3 жыл бұрын
its zingy because the cheap alu wheels LOL
@DanBlake3rd3 жыл бұрын
As a big guy shopping gravel bikes, I watched this video and the QR vs thru-axle one with great interest. Having discovered that most dealers are sold out due to the pandemic, I’m looking at Ti and magnesium framed bikes from Lynskey and Vaast respectively. Would love to hear your comments on magnesium, or in the Vaast case, “super” magnesium. -Cheers
@rosomak8244 Жыл бұрын
Don't go near magnesium. The material is prone to failure due to corrosion. The "super" is only a marketing BS term for galvanic surface treatment. Over the long term this will not protect the frame at all and is prone to quality issues right from the start.
@CW4PWR3 жыл бұрын
Enjoyed the video. I am also a larger rider (250+ lbs). I notice the bottom bracket moving laterally quite a bit when I rally push hard on the peddles. I imagine that movement results in a loss of power transfer to the drive train. How power is lost and is there an optimum frame geometry and material for high torque applications? I have measured over 1,000 ft/lbs of torque (Garmin Vector 2) on some of my sprints.
@renebaretta3 жыл бұрын
Thanks for being a fresh voice in the clutter of bike marketing :) You are doing the community a service by making basic engineering easy to understand and give the consumer some tools to weed out the bs marketing. So, keep up the good work (it isn't work if you luv doing it ;)) and don't look to much at the comments...for some it will never be 100% ✌