The Freewheel Wobble - Why A Cassette Won't - BikemanforU Tutorial

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BikemanforU

BikemanforU

10 жыл бұрын

Freewheel wobble is caused by misaligned threads on the wheel, as BikemanforU shows in this tutorial. Free shipping www.bikemanforu on bike parts, tires, tools, and cycle accessories. The irregular motion, which can be severe in some bicycles, starts inside the factory that manufactured the hub used in the bicycle wheel. Poorly machined hubs result in misaligned threads, which means the freewheel can't thread evenly onto the hub. Unbalanced rotation is the result. Since cassettes use a splined freehub with external ratchet system, they don't have this threading issue. Learn the difference in wheel hubs that accept a freewheel and the freehub that works for a cassette - and find out why cassettes don't have this problem. KZfaq's award-winning guru of bicycle repair and maintenance delivers a close-up look at two examples of the issue - starting with a wobble so extreme it pulsates the crank and pedals. We also get a look at a tacoed wheel and how to get the freewheel off using special a special tool and a vise. Learn the art of self reliance with the BikemanforU channel Subscribing's free for new videos plus the bike shop LIVE Show. / bikemanfooru Social media - google + bit.ly/1eJU6fR @bikemanforu Like / bikemanforu and / bikemanforu Join tech happy hour #bikemanforu Fridays at 5:15 pm eastern www.younow.com

Пікірлер: 293
@ChinoZ32
@ChinoZ32 2 жыл бұрын
2022, buy a new entry level bike, discover a mild "wobble", I search, and come here to learn the difference between a freewheel and a cassette, and also why the wobble occurs. Underrated channel. subbed!
@Leofangclaw
@Leofangclaw Жыл бұрын
Almost ordered online a new wheelset and cassette. Lol
@dylannoonan478
@dylannoonan478 10 ай бұрын
I ordered a new one before finding this video
@KPI358
@KPI358 3 жыл бұрын
This video was posted 6 years ago and is still HELPING people.. thank you bikeman
@faz7tube
@faz7tube 3 жыл бұрын
Absolutely... It helped a lot..
@leighgraham5873
@leighgraham5873 4 жыл бұрын
Bikeman, I just noticed a very slight wobble on my freewheel, infant freak out, bent? Money? Aaargh! On to Google straight to your video, instant relief! You sir are an asset to cyclists everywhere! Thanks!😀😀😀
@officialclownbusiness7788
@officialclownbusiness7788 9 жыл бұрын
I have been fixing my own bikes for over a decade, so I know a bit about them, but I never knew what caused that wobble. Thanks for teaching me something new today, bikeman!
@errolkim1334
@errolkim1334 6 жыл бұрын
Up until 10 seconds ago, I thought I had a cassette on my bike, I don't. I have a freewheel. +2 to this video!!!
@chait43
@chait43 3 жыл бұрын
Thanks Man for helping me ! The repair guy was saying that the cycle hub is damaged.Thanks so much !
@ncgrether
@ncgrether 3 жыл бұрын
my SRAM PG1230 cassette wobbles, and its causing ghost shifting. I figured out the aluminum body that mates with the freehub had worn unevenly so that is sat on the freehub at a slight angle. It took a bit of trouble shooting so hopefully this helps someone else. Nice dance moves bikeman, btw; good video.
@akzorz
@akzorz 8 жыл бұрын
1:26 The word you were looking for was "gyrates". YW and much love from Denver!
@virginiaroach6103
@virginiaroach6103 7 жыл бұрын
Love your videos, I too am a person of the old school 70's/80's stuff. Recently rediscovered my love of the Schwinn voyageur 11.8 when I got a mint condition 1981 model. Ride everyday now again was delighted to find it has a cassette gear system.
@rogergraham5914
@rogergraham5914 8 жыл бұрын
Bike Man you ROCK!!! Just Subscribed, sorry it took me so long. I was searching for the reason for the wobble and came across this. Your explanations and examples are awesome. Love the humor, and the way you take care of your customers.
@errolkim1334
@errolkim1334 6 жыл бұрын
Great video thanks for taking the time to make this video and upload it, I appreciate it. Thanks from London England. I noticed my rear brake pads were rubbing, so I adjusted the brake. No cigar. I couldn't understand it so I put lifted up the bike and span the wheel, about an hour ago. I thought my eyes were deceiving me. The cassette was doing the wobble. This is on a Giant Escape 3 with negligible mileage.
@prestongolden9901
@prestongolden9901 10 жыл бұрын
Thanks Bikeman, always learning something from your video instructional/tutorials.
@htecio
@htecio 8 жыл бұрын
Thanks for this video. I thought for sure the cheap MTB I bought online was defective. I'm glad I don't need to change parts so soon.
@serba73
@serba73 3 жыл бұрын
bikeman we love you from all around the world. greetings from Turkey.
@krishnasheela
@krishnasheela 8 жыл бұрын
Gifted man that you are ,because you explain with great humour
@Adamchavez74
@Adamchavez74 9 жыл бұрын
Love what you do Bikeman!
@ChancetheCanine
@ChancetheCanine 4 жыл бұрын
I am so glad I caught the last 2 years he was on!! :)
@gienry
@gienry 8 жыл бұрын
+BikemanforU so, there's no way to fix the wobble on a freewheel hub?
@chrlz904
@chrlz904 Жыл бұрын
I appreciate the explanation, and will assume that unless the wobble is near to or worse than that first example, it's not worth fixing..? And given that every bike I've owned, (cheap ones) and every other medium to expensive bike I've had the opportunity to examine, have ALL had at least a slight wobble, and that none thereof have suffered in any measurable way from this affliction.... Well, I'm guessing it may be ignored. I am grateful that you have left me with a sense of mystery, of unfinished business.. I think.
@acewilliams7917
@acewilliams7917 4 жыл бұрын
1:05 Lol!!!😄 That is a glitzy bike man!!!! Mr.Pump cracks me up.
@dreadknot2238
@dreadknot2238 Жыл бұрын
Thank you bikemanforu now I can sleep peacefully
@Dbdconnect
@Dbdconnect 5 жыл бұрын
Thank you for the education, BikemanforU. You're awesome.
@mas465190
@mas465190 9 жыл бұрын
Gotta love the Bikeman!
@cmscott
@cmscott 4 жыл бұрын
Need to set the record straight here...cassettes "CAN" wobble too, just not as pronounced. I just tested mine, and I know it's a cassette, and it has some slight wobble. For freewheels, it's more often than not related to the machining of the hub shell. If it's not machined perfectly internally (meaning slightly off axis), as the body rotates it will experience a high-to-low movement. It's explained very well here: kzfaq.info/get/bejne/ha9mfdt9kuDOiJc.html
@danfuerthgillis4483
@danfuerthgillis4483 5 жыл бұрын
99% of the time it is a badly made back wheel freewheel mount threads ( hubs are crooked. All freewheels will wobble based on the wheel thread mounts being straight or off center. This video is very important.
@bruceperry1408
@bruceperry1408 5 жыл бұрын
I expect the worst wobbles are a combination of freewheel bearing assembly misalignments AND hub treading. I have seen wobbles that seemed worse in some particular alignment of FW with the position of hub and less wobble in another position of hub/wheel.
@Pnicolodi3
@Pnicolodi3 4 ай бұрын
thanks, you saved me from trying to make a tool so I can ride tomorrow 😂😂😂
@ahalll5364
@ahalll5364 4 жыл бұрын
Thank you so much BikemanforU for this help.I was searching for it like crazy on the internet it is truly very very helpful .
@jujuyuyu123
@jujuyuyu123 8 жыл бұрын
thanks so much. it really give me relief that this is just a normal occurrence with free wheel
@ryukenjo
@ryukenjo 8 жыл бұрын
Hey Bikeman! Thanks for setting our mind to rest! Your are the best! With gratitude - from Singapore.
@barimagas
@barimagas 2 жыл бұрын
Thanks man, i was very disappointed with my new bike, until i found you explanation.
@alvin8391
@alvin8391 Жыл бұрын
Bikemanforu mentions the inexpensive bikes sometimes sold by large retailers. I bought one, a Dynacraft made MTB called a Rockrider ST 50. It arrived with a faulty front derailer (pardon my English!). I could not fix it because the routing of the shift cable was directly down when the cam needed to move the cage horizontally, outward - away from the frame. The retailer gave me a full refund and told me to dispose of the bike, if I wished. I decided to try to re-route the shift cable around the outside of the bottom bracket instead of under the bracket. By so doing, arlound the small outer projection of the bracket, I was able to apply an outward component of tension to the cam, I was then able to shift into the 3rd or largest gear. Moral of the story: sometimes one can fix a problem with an inexpensive bike. I have since made many changes to the bike: I added a handlebar stem extension and replaced the flat handlebar with a "swallow". I can now ride my MTB in an upright posturre; much more comfortable for city biking. Also I added a springy seat and with the front suspension of the MTB, I now have a full suspension for the city bumps. Why not just buy a city bike in a bicycle shop? Because they begin at $400 and was a single speed, all steel. The bike-shop, $400 "Special" did not even have a front suspension. My MTB was priced at $98, and it was refunded to me. Bike shops may be better when shopping for top of the line bikes.
@truckertom3323
@truckertom3323 7 жыл бұрын
That was very interesting information Bike Man.
@dale7561
@dale7561 4 жыл бұрын
Thanks for this. Was super worried until I saw this
@kevindelka2304
@kevindelka2304 3 жыл бұрын
Thank you for SHOWING me exactly what I was looking for. Brilliant!!!
@jose73248
@jose73248 7 жыл бұрын
Hello Bikeman, thanks for the explanation. I have a Shimano cassette with a unknown hub, 9 sp. I did a clean up of the whole thing, but after I did some miles last night, the lock ring is getting loose again (It was loose when I removed the cassette). I'm sure it was tight when I did the assembly. What could be wrong that causes the lock ring to get loose? Thanks for the help!
@nukedathlonman
@nukedathlonman 10 жыл бұрын
Okay, so how about when a cassette has a slight wobble like on my mountain bike (correct 9-speed cassette with a Deore 525 disc brake hub). It's a ton less then the two free wheel's you showed, but a slight wobble is def present on it. I'm not overly worried about it - the wobble has been present since the wheel was new 10 years ago and works fine. Just wondering what you think. I figured it's a machining problem and nothing to worry a-boot. On a side note, just something I find funny - my old Bianchi Sport roadbike has it's original Suzue hubs and original Suntour 6-speed freewheel and it has no wobble (none at all) - so my bikes are backwards ! LOL
@teamramrodmtb
@teamramrodmtb 6 жыл бұрын
Cassettes can wobble if the hub surface they're on isn't perfect, or if there's a defect inside the ratcheting mechanism of the hub. So it's not 100% that they won't wobble. And given the age of your bike, they hadn't refined the art of cassettes at that time either. They're much better at it now so on new bikes it's more likely for a freewheel to wobble than a cassette. That wasn't always the case. Some of nicer older bikes they didn't mass produce them with much carelessness, so they'd make sure the threads were machined correctly. They were practically flawless.
@mmuhiuddin
@mmuhiuddin 3 жыл бұрын
Can this also cause the wheel to wobble a little? My freewheel wobbles a little like the second example shown in the video, but my wheel also seems to wobble and kisses the right hand brake block at one particular point. Could this be related to the poorly threaded freewheel or is the rim just out of true?
@69mrsteveo
@69mrsteveo 8 жыл бұрын
I agree with the old man it's beautiful!
@catlady8324
@catlady8324 10 жыл бұрын
I'm going for "The Adam West award": Oh no BikeMan. It's not that you're calling that POS bike a POS (or BSO), but it's how you're laughing at it, the poor saps who don't research before buying, and having WAY too much fun about it. Every bike is a winner & even last place should get a trophy! If not, the poor wobbly Titan bike will develop insecurities & later life chrisis's-es. With love & neutering even the Titan bike could be a winner, a very special winner. Where we're all winners. God bless us all, everyone. I'll prepare my award acceptance speech for this Friday. Thx in advance.
@Patrick94GSR
@Patrick94GSR 7 жыл бұрын
I have a 2011 Felt road bike with 105-5700 10-speed drivetrain, which came with Mavic wheels with Felt-branded hubs. The cassette absolutely wobbles on the freehub. I'm not sure what the actual make of freehub is on the rear wheel. Conversely, I also have a Vuelta Corsa Lite wheelset with a Vuelta-branded Novatec F172SB 10/11-sp freehub, and the same cassette does not wobble in the slightest on that one. So what's causing the wobble on the 10-sp freehub on the Mavic rims?
@simonasm2647
@simonasm2647 8 жыл бұрын
Bike man, you are awesome!
@viejolemuroloco2016
@viejolemuroloco2016 7 жыл бұрын
this guy is like van dam in another multiverse
@catlady8324
@catlady8324 10 жыл бұрын
Will BikeMan do the viral phenomenon, the "Ice Bucket Challenge"??? Everybody's doing it!!!
@cdb1275
@cdb1275 9 жыл бұрын
Thanks Bikeman, really useful
@dagconst1
@dagconst1 4 жыл бұрын
I need help !! Lol . When I back pedal then pedal forward the freewheel doesn’t connect to hub motor , so it feels like slack for like a half turn of pedal . Any advice ? Thanks Dave
@mohammedzakariaali1169
@mohammedzakariaali1169 7 жыл бұрын
Thanx BikemanForu, you're awesome.
@robertshackelford7291
@robertshackelford7291 6 жыл бұрын
Other than very minor thread defects... 1. Freewheel / Cassette wobble is primarily caused by NON-CONCENTRIC hub shell machining. The hub shell will wobble if the bore and profile of the hub shell is not directly centered from one end to the other. The motion translates to the freewheel / freehub cassette 2. Occurs mostly in high volume production of budget or entry level products. 3. Can effect freewheel spec AND freehub/cassette spec hubs. 4. Has little or no effect on shifting. If shifting issues are present, the problem will be elsewhere. Yes, you read #3 correctly. Freehub / Cassette spec hubs are not immune from this. =8-)
@louietoro5360
@louietoro5360 4 жыл бұрын
The Bike man rocks! Thx bro. That was an awesome class.
@greg0063
@greg0063 4 жыл бұрын
Finally an explanation that makes sense!
@BikeGuyFPV
@BikeGuyFPV 9 жыл бұрын
Threading, yes can be an issue. But it is not the only one with thread on freewheels. One other thing that was not mentioned. Lower quality freewheels will also do this/any freewheel if the cones inside the freewheel are not machined squared. If your freewheel has a loose lockring, this can be a big reason why it's wobbling a lot. A minor issue, having sightly oversized and undersized ball bearings will result in a wobble too.
@chezfpv9139
@chezfpv9139 Жыл бұрын
Here I was trying to find out more about my gravel bike and find a fellow FPV pilot! Your username checks out haha (I raced with you during the first sports champs)
@lilb34n_
@lilb34n_ 2 жыл бұрын
The background commentary is beautiful 🤣
@zfiddy
@zfiddy 9 жыл бұрын
Ive got the exact same wobble. But its a cassette? Any ideas why?
@strategicthinker8899
@strategicthinker8899 7 жыл бұрын
The hub has manufacturing faults and it's machined crooked - one side or both sides of the cup are not in the center of the hub. Most hubs are faulty. That is why the wheels get loose and start wobbling on the cones. Replace your hubs, but you have to check them before you pay for them.
@alangross2277
@alangross2277 2 жыл бұрын
There are plenty of videos on Cassette Wobble as well...LOL!
@patwang84
@patwang84 10 жыл бұрын
Awesome Video Bikan more please. My freewheel doesn´t wobble as much as the posin.bike. Is it because i have a really good freewheel and a high quality freewheel hub??? i have an old maillard sachs in combination with a shimano freewheel, guess the posin bike has a too low quality for 170Dollar it is cheap but not good or?
@vanlitespeed9325
@vanlitespeed9325 9 жыл бұрын
I like the "one less car" slogan on the back of he shirt :)
@neckybliss1
@neckybliss1 4 жыл бұрын
Thanks for explaining this. I've been trying to work out how to fix the wobble but I see I can't now.
@RealCadde
@RealCadde 7 жыл бұрын
Incorrect, a bent axle will cause a cassette to wobble too. And even the freewheel body being out of shape can cause issues with cassettes.
@rinzualapachuau4894
@rinzualapachuau4894 4 жыл бұрын
Thanks... finally i understand the wobble in my bike
@thothheartmaat2833
@thothheartmaat2833 2 жыл бұрын
the fix for a free wheel is as easy as backing off the nut on the opposite side of the freewheel, turning in the little holding piece then tightening the nut back up. i just did it this morning.. you may want to grease your bearings but its a bit of a pain. i did it the hard way.. i always do everything the hard way..
@volvo09
@volvo09 8 жыл бұрын
Informative video, thanks!
@dannyb0978
@dannyb0978 6 жыл бұрын
Hi there bikeman. What's your opinion on Falcon freewheel and derailleur?
@williamvicevich3035
@williamvicevich3035 4 жыл бұрын
Good information simply presented. Great job.
@johnhanley9946
@johnhanley9946 9 жыл бұрын
I don't think wobble in the freewheel is caused because of the hub, because if it was the freewheel would wobble going forward too, and then the gears wouldn't shift properly. No, I think it's caused by the internal bearings that allow the freewheel to ratchet while the wheel spins backwards. They're not made to be precise that way, but durable.
3 жыл бұрын
I don't agree!
@johnhanley9946
@johnhanley9946 3 жыл бұрын
@ It is the hub, I learned more about it since I made this comment 6 years ago.
@ka01si09ma
@ka01si09ma 3 жыл бұрын
@@johnhanley9946 Thanks for addition
@BobzAirgunz
@BobzAirgunz 2 жыл бұрын
Just what I was looking for,thank you!
@tomtate4339
@tomtate4339 7 жыл бұрын
I'm educated!! Thanks Bikeman!!
@mihaim3587
@mihaim3587 6 жыл бұрын
Hello, can you please help me? I have the same problem, but the freewheel is standing still and the wheel wobbles. I taught that the wheel was decentered so I changed it, but same problem. It affects me because the wheel wobbles while I ride the bike and the chain moves left and right and it hits the front derailleur. Help please
@jaydiaz8909
@jaydiaz8909 10 жыл бұрын
Hey bikeman, do you hulahoop? Lol. Thanks for the lesson my bike does the same thing but not as bad.
@aravinthb4098
@aravinthb4098 4 жыл бұрын
Thanks man for making video on this , I thought my bike has a damage
@jared4670
@jared4670 2 жыл бұрын
Thanks mate. Now I know what to upgrade on my bicycle next.
@krishnaharidevkota7145
@krishnaharidevkota7145 8 жыл бұрын
will the woobly freewheel cause any problem while riding??
@1xfekqu226
@1xfekqu226 4 жыл бұрын
Ya the chain might fall of
@noureddineelaroussi7680
@noureddineelaroussi7680 7 жыл бұрын
I just subbed, fun and informative, keep up the good spirit Mr Bike man!
@eapaiva
@eapaiva 7 жыл бұрын
I have a problem where the pedals move when I spin my back tire. Do you know how to fix this? Please help!
@johno4521
@johno4521 6 жыл бұрын
That's a pretty extreme bottom gear on that there Trek!!
@bcqwert
@bcqwert 8 жыл бұрын
very interesting. Thanks for sharing :)
@mikeleight7437
@mikeleight7437 2 жыл бұрын
This guy knows about bikes...
@rockitpower8190
@rockitpower8190 Жыл бұрын
Hey bike man can u do one of these videos but for a Beach cruiser?i think its a coaster??bike?
@acewilliams7917
@acewilliams7917 4 жыл бұрын
1:05 Lol!!!😄 That is a glitzy bike man!!!!
@breddary
@breddary Жыл бұрын
At least somebody answered the phone 😅🤣
@RCBandit25
@RCBandit25 7 жыл бұрын
Strange. I have a freehub and the dang cassette woggles as well. Can't be the axle because the axle does not move. Took it all apart, cleaned all parts, put back together and still wobbles.
@reiniertl
@reiniertl 4 жыл бұрын
The bore in the hub is not concentric with the spindle, it is the same problem as with the freewheel. Lack of egocentricity can happen in both mechanisms but the freewheel is more likely to have the problem because is harder to get threads to run concentric than it is for cylinders.
@albertbatfinder5240
@albertbatfinder5240 2 жыл бұрын
@@reiniertl I wouldn’t know how to deal with an egocentric freehub. It’s bad enough that my seat post has a mind of its own and chooses a different ride height whenever I go out.
@reiniertl
@reiniertl 2 жыл бұрын
@@albertbatfinder5240 I meant eccentric, probably the autocorrection tool just screwed this up. It would be really hard to deal with an egocentric freehub, :-)
@albertbatfinder5240
@albertbatfinder5240 2 жыл бұрын
@@reiniertl I guessed as much, sir. But you know, sometimes I just love autocrustacean.
@jeffpeter7879
@jeffpeter7879 7 жыл бұрын
am having the wobble, I tried to replace the cups to no success, what do I do,
@bcextra
@bcextra 10 жыл бұрын
great video!
@chungchichiu9779
@chungchichiu9779 4 жыл бұрын
I like your informative videos very much. Thanks
@benjaminmutua1485
@benjaminmutua1485 4 жыл бұрын
Dose it affect the shifting of gears
@jackgilmore6866
@jackgilmore6866 8 жыл бұрын
Hi bikemansforu what do u do if my tyre isnt in the middle of the forks
@silentmike4320
@silentmike4320 10 жыл бұрын
very helpfull Thx Bikeman !!!
@johnsandoval347
@johnsandoval347 3 жыл бұрын
Thanks Again Bike Man!!!!! Groovy!
@Bijou-Bob
@Bijou-Bob 10 жыл бұрын
you should lecture bikeman More knowledge perfectly explained :-)
@ringo_fishin
@ringo_fishin 8 жыл бұрын
my cassette won't spin freely when I'm moving forward. it has a lot of resistance. and the chain ist too tight. any suggestions?
@haiminh0216
@haiminh0216 3 жыл бұрын
Thank you Bikeman
@stevehill4084
@stevehill4084 8 жыл бұрын
I've got a rear wheel with cassette (SRAM X/O) on the stand right now that is gyrating. To say that cassettes aren't subject to wobble is inaccurate. Components within the hub can wear out or become damaged and cause a similar problem...now to figure our if we need to change spacers, replace a bearing or two, or give the customer the news that he needs a new rear hub & cassette.
@-agaming6003
@-agaming6003 4 жыл бұрын
So what do I need to get new for the bike the cogs or wheel thing??
@shree203
@shree203 5 жыл бұрын
Nice hulu hu man.... Subscribed because of the hulu hu😂
@hipeoplesSr
@hipeoplesSr 9 жыл бұрын
i have a cassette that wobbles i just had the rear wheel changed after a bent to far rim. They told me it was a cassette should i bring it back because of the wobble?
@whazzat8015
@whazzat8015 9 жыл бұрын
hipeoplesSr freehubs can have wobble from bad bearings. many are standard and an easy change out, some are weird, proprietary and hard to get parts to replace. They are rebuild-able ,in theory, but such a PITA that nobody does it, as it's easier , cheaper and faster to replace the whole hub.
@Drogos79
@Drogos79 4 жыл бұрын
so question you are asking yourself in beginning is still unanswered ...do you fix it? how much wobble is accepted, how u fix it ?
@Mocredible
@Mocredible 3 жыл бұрын
Uhh.. That was nice pointing out the problem. But how do you fix it??! I just brought a brand new mountain bike that came with this wobble and I’m highly ticked off. Smh..
@tomcatxsl6742
@tomcatxsl6742 8 жыл бұрын
Oh yeah, the trek and that Megagear freewheel, great low power for those big hills!
@tomcatxsl6742
@tomcatxsl6742 8 жыл бұрын
+TomCat Xsl Megadrive I mean
@pashaATX
@pashaATX 7 жыл бұрын
here is my question : real quick - mine is a cassette set up like you showed not the freewheel yet the wobble is definitely looks like what you showed. and the axel looks straight, I'm going crazy over this - please help if you have any other possible reasons for this ...
@weston40
@weston40 7 жыл бұрын
ditto
@sacrificialrook6283
@sacrificialrook6283 7 жыл бұрын
paul C The short answer is "it's bent." The union where the cassette splines meet the hub is unsupported internally and can flex/bend under high load. Freewheels are more prone to this because the bearing supports the hub, leaving the outside of the freewheel unsupported. One good stomp on cogs 5-7 from a stop is usually enough to "pull" the freewheel forward creating the bend @ the hub union. Cassettes are supported by the bearing at the outside of the gear stack, making them overall stronger and more resistant to drive flex, but NOT immune. If this is your problem, replacing the hub is the best option as this will cause uneven loading on bearing surfaces and chew the bearing races/cones up, regardless of cassette or freewheel.
@tarstarkusz
@tarstarkusz 9 жыл бұрын
It's not because the thread is bad, it's because it's a thread. Threads are like a record grove in that no two spots on that thread are in the exact same spot. The higher the thread count (per inch) the less wobble you will get, but it will always wobble. A high thread count means the beginning of the freewheel is extremely close to the end of the freewheel and a low thread count means the beginning of the freewheel is further from the end of the freewheel. If there is a spacing of .25mm between the threads, the freewheel will be .25mm off from straight.
@SAMIMYS
@SAMIMYS 9 жыл бұрын
tarstarkusz you found the magic behind it :)
@willwhite1987
@willwhite1987 9 жыл бұрын
tarstarkusz "No two spots on that thread are in the exact same spot". Thanks for this insightful truism, you can even replace "on that thread" by "in the universe", it would be no less true and it would provide a nice generalization. Now for your post: I don't get your explanation. Can you tell me again why the thread count (per unit of spatial measure) should matter in the wobbling? If the freewhel has the same density of threads as the hub, they should be perfectly alined. Why should it wobble, then, if not because of a bad thread? To provide an intuition, when you screw a screw, the axis of the screw and that of the whole remain aligned: the screw does not wobble. Why should it be different here, if not because of a faulty thread?
@tarstarkusz
@tarstarkusz 9 жыл бұрын
wiwh Because screws have much smaller threads (in diameter). A low TPI makes the freewheel slightly tilted and so the wobble is more noticeable. Even with the same density, the leading edge will be slightly closer to the spokes than the trailing edge and that seems to be where the wobble comes in. What is your hypothesis? How could a bad thread cause this? An out of true thread (especially by this much) would be difficult to screw on the freewheel.
@Niidea1986
@Niidea1986 8 жыл бұрын
+tarstarkusz My bike is a freewheel and does not wobble at all.
@tarstarkusz
@tarstarkusz 8 жыл бұрын
+Niidea1986 Any decent quality threads should make the wobble imperceptible.
@dudelivestrong
@dudelivestrong 10 жыл бұрын
The repair cost more than the bike hahaha!
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