BMX Stem Geometry - EXPLAINED
Рет қаралды 28,383
5 жыл бұрынEdit* BMX Stem rise is actually measured from the bottom of the stem to the center of clamping area.
BMX stem geometry appears quite simple at first glance, and for all practical applications of stem geometry, it is as simple as it seems.
However, there is more than meets the eye and a lot to talk about in regards to BMX stems and their geometry.
Hopefully this video can help you make an educated decision the next time you’re in the market for a new stem!
Thank you for choosing to spend your time watching one of my videos!
If you enjoyed it, share it with a friend and let me know in the comments below. If you’re new, please consider to like favorite and subscribe!
Consider Subscribing - bit.ly/Brant_Moore
Patreon - / brantmoore
20% Crew Tee & Other Merch - teespring.com/20crewwheel
BMX News - bit.ly/bmx-news
BMX For Beginners - bit.ly/bmx-for-beginners
BMX Tips & Tricks - bit.ly/bmxtips
BMX Brake Guide - bit.ly/bmx-brake-guide
BMX Geometry Explained - bit.ly/bmxgeometry
BMX Jams & Events - bit.ly/bmxevents
BMX Games - bit.ly/bmxgames
Rider Spotlight - bit.ly/bmx-spotlight
Lip Lords - bit.ly/liplordsplaylist
Podcast Episodes - bit.ly/bmxpodcast
My Equipment - www.amazon.com/shop/brant_moore
Instagram - / brant_moore
Facebook - / officialbrantmoore
@KarmasAbutch 5 жыл бұрын
Dude you’re like a BMX scientist... and with a natural born teaching ability that’s miles ahead of the other youtubers who let their online personality get in the way of the information. In the 80s we literally hammered thin metal slivers into our seat clamps and secured loose and stripped brakes to the frame with wire before each ride, the session lasted as long as the wire did haha! Pedals back then had cotter pins in them, if it took too many hits you’d end up with a slightly floppy pedal on one side .... (its no wonder I was so shit) - things have come a long way.
@Brant_Moore 5 жыл бұрын
Hey thanks man!! I try to do my best and let my real personality be my online personality. That sounds sooo crazy though. Wow. Sounds like a different world
@marcusburgess1701 2 жыл бұрын
Agreed! Edits are fantastic as well
@jeramimachado383 4 жыл бұрын
Every time I need to find out something about BMX it always leads back to you. Honestly thank you for all your hard work
@Brant_Moore 4 жыл бұрын
That's really really motivating to hear man, thank you!!!
@AntOn-nf9fi 5 жыл бұрын
Imagine that. The bike has to be one of the best inventions ever and look at how it has evolved. fantastic. Just the thought processing going into designing this stuff is amazing.
@RonnieRawdawg 5 жыл бұрын
longer stem = more stability but slower barspins/whips. harder to get into nose mannies but easier to hold em, shorter stem = more twitchy but faster barspins/whips, easier to get into nose mannies but bit harder to hold
@Brant_Moore 5 жыл бұрын
Hey thanks for putting this in here! I didn’t want to mis speak in talking about it while making the video
@RonnieRawdawg 5 жыл бұрын
@@Brant_Moore i wish i knew what i knew now when i was 14 haha, learning all about geo and how everything effects everything
@Brant_Moore 5 жыл бұрын
It’s pretty crazy isn’t it?
@RonnieRawdawg 5 жыл бұрын
@@Brant_Moore i know haha, i want the 36mm Madera stem next, currently on the 54mm. im trying to make my front end twitchy with 15mm deco fuforks, 75.75HT
@Brant_Moore 5 жыл бұрын
That’ll definitely do it! Haha
@captainpugwash788 5 жыл бұрын
That was awesome Brant - very informative! Thanks for putting so much effort in. Hope your channel continues to grow - you deserve it-:)
@Brant_Moore 5 жыл бұрын
Hey thank you!!! Trying my best to make the best possible videos! Really appreciate the kind words Mr. Pugwash!
@Ernxsto95 4 жыл бұрын
Amazing video, you explained it so well, thanks !
@SavageAudits 10 ай бұрын
Excellent, in-depth vid. 👍
@nik_evdokimov 2 жыл бұрын
Great explanation, thank you for this video, learned something new today :)
@Brant_Moore 2 жыл бұрын
Love to hear it!! Thanks for watching
@KevinMeyerBmxoff 5 жыл бұрын
Awesome video !! Really good job
@stevenroark6727 3 жыл бұрын
Great videos keep up the good work !!!
@Brant_Moore 3 жыл бұрын
Thanks man!!! I'll do my best
@pedrocahuex7864 4 жыл бұрын
Tuve que poner los subtítulos en español, pero aprendí, realmente en español no hay tantos vídeos que expliquen la geometría así que muchas gracias.
@jmza2157 4 жыл бұрын
Damn. Well explained bro. Muchas gracias
@Brant_Moore 4 жыл бұрын
Always happy to help!!!
@CrisKG125 5 жыл бұрын
Very cool video man keep it up. 👍👍🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
@Brant_Moore 5 жыл бұрын
Thank you man!!! Trying my best
@MrFroggy29 Жыл бұрын
A beautiful cnc stem, it s a realy piece of art!
@indigneouschupacabra43 3 жыл бұрын
Thank you for this video, a true bike hero righ here.
@Edub-vp6rx Жыл бұрын
That was awesome….thank you🔥🙌🤙🏻
@eclipselunar3850 4 жыл бұрын
This is awesome thank you!!!!
@Brant_Moore 4 жыл бұрын
You’re awesome for being here to see it! Thank you!!!
@defooraap 2 жыл бұрын
If you know the reach and rise of a stem, you can use the Pythagorean theorem to calculate the extension. (Reach x Reach) + (Rise x Rise) = (Extension x Extension)
@yvandupapier 5 жыл бұрын
It would have been great to say that having a stem with a recessed cut out increase the rise of the stem, cause it will need and additional spacer to keep it to the same : (ex : fiend morrow V1 vs V2)
@bmxriderforlife1234 5 жыл бұрын
also worth noting make sure your fork compression cap clears the recessed out area, my buddy had an issue where he had to file his down a lil to get it to fit.
@Shamarihindsbmx Жыл бұрын
Dig these videos 💪👍
@yvandupapier 5 жыл бұрын
Also, I often hear that people would either change they bars for a 0.25" lower, or switch to a frond load. But they don't realise how lower a front load stem will keep their bars compare to a 0.25" lower bars. There might be more than 1" of difference. Anyway, I love frontload stem.
@duanevh3790 3 ай бұрын
good video, would you really notice a big difference from 48-53mm?, when you buy a stem seperate do they usually come with the plastic top cap?
@pktuveu 4 жыл бұрын
Hi Brant ! Do you know how the rise impact our riding ? I'm confuse with 2 stem as the same spec but different RISE. Good video !
@Brant_Moore 4 жыл бұрын
It puts your bars higher up which can help with back strain and give a different feel to riding. Whether or not it is good is up to the person riding
@eddiebmxindia 5 жыл бұрын
Fanatastic bro
@Brant_Moore 5 жыл бұрын
Thanks so much!
@blackscoped 3 жыл бұрын
I was wondering if the fork bore size is the same with all bikes? I have an OLD gt-bike and need a stem.
@D_BWOYSHOW 5 жыл бұрын
I've learnt a lot.... Like.
@owenvideto2019 3 жыл бұрын
I got new bars but they are thicker then my old ones. The stem does not fit with them is that the new bars or just because they are bigger? And what is the most common diameter?
@myronbungkilan3200 3 жыл бұрын
Hello if fork size 26mm what size stem can fit in? Pls help
@Dems411 3 жыл бұрын
good vid 👍
@Brant_Moore 3 жыл бұрын
Thank you! Hope it helped you
@RVSTundrae46 5 жыл бұрын
What are the most grip stem, my bars keep moving up and down no matter how tight I get em??? Thanks in advance
@Brant_Moore 5 жыл бұрын
New stem and bars will probably solve that. Most stems are about the same in this
@theohiggins9120 5 жыл бұрын
Where are t1 stems available? I want one.
@hreyes3919 5 жыл бұрын
Good video
@Brant_Moore 5 жыл бұрын
Thank you!
@user-st5jn2gu5y Жыл бұрын
Hey does anyone know what fit stem he is showing ?
@twentytolife4401 5 жыл бұрын
That Profile 40 stem is just ridiculous, but to each their own.
@cappin6937 4 жыл бұрын
Hey man, great video, but I have one question - You say that the rise of the stem is measured from the center of the steering bore to the center of the handlebar clamp, in a different video a guy said to measure the rise starting from the Very bottom of the steering bore of the stem. This has confused me a lot, because using your method here my Front load stem rise will end up in the negatives, but measured from the very bottom of the steering bore of the stem it will be about 7mm, which is what sourcebmx is telling me the rise of my stem is. So I'm just curious if you could inform me on which is the correct way or whatever is going on here. Thanks heaps
@Brant_Moore 4 жыл бұрын
Apparently my video is incorrect. Looking into things, the resources I used for that piece of information were incorrect as well. All bmx stems I can see appear to be measured from bottom of stem to center of handlebar clamp. I can’t believe it took this long to figure it out
@Brant_Moore 4 жыл бұрын
The weird thing is that it appears some stems are measured the way outlined in this video. How confusing. Practically though, there’s no reason to need to measure for yourself and not trust the info bmx companies are giving unless there is zero spec information from them
@cappin6937 4 жыл бұрын
@@Brant_Moore Thanks heaps bro, you're the man. I am just doing up my bike and need to calculate the rise I currently have and what I will have with new parts to make sure it will be good. Thanks again.
@alvinluzon Жыл бұрын
I changed my stem with a new one, how come my headset became loose? now it has a little play when i brake the front caliper. should i add a spacer? or add more millimeter coz i noticed that the stack height of the new stem is different from my old one.
@Brant_Moore Жыл бұрын
If the stack height is lower on the new one it could be your problem. If that is the case, another spacer should help
@teddyr7901 5 жыл бұрын
😎 👍
@tommyh3485 4 жыл бұрын
What size mm stem screws should I get?
@Brant_Moore 4 жыл бұрын
Honestly I’m not sure how long they are. I feel like it would be a specific size that they all use
@AntOn-nf9fi 5 жыл бұрын
Quick question regarding stem bolts. Do you put grease on the bolts?
@Brant_Moore 5 жыл бұрын
I personally do, and doing so got rid of some creaking on a stem in the past for me
@RonnieRawdawg 5 жыл бұрын
use permatex anti-sieze like $8 for a bottle that will last you a lifetime at autozone
@cbrizz 5 жыл бұрын
Yes, grease any metal on metal contact except on your bars, that’s just dumb
@AntOn-nf9fi 5 жыл бұрын
@@cbrizz Thanks man yes was bit of a dumb question. LOL.
@AntOn-nf9fi 5 жыл бұрын
Complete bikes I suppose are already greased up.
@joedancollard3114 4 жыл бұрын
Im actually a beginner in bmx and I want to know if any stem will fit on my bmx it’s a Sunday scout 2019
@Brant_Moore 4 жыл бұрын
Yes any modern BMX stem from a major brand will work
@joedancollard3114 4 жыл бұрын
@Brant_Moore ok thanks I was really worried about ordering something that wouldn’t fit
@poboypowder7567 4 жыл бұрын
Joedan Collard good bike, I got the same one
@joedancollard3114 4 жыл бұрын
Flaymezilla yeah i just bought another bike today getting it soon cant wait to do some
@charliemerrill8687 6 ай бұрын
Hey brant, any stems that you would recommend for techy- street riding? thanks .. charlie m.
@Brant_Moore 6 ай бұрын
Would depend on what you like to do. A shorter reach stem makes barspins quicker and can make the steering feel more reactive
@charliemerrill8687 6 ай бұрын
@@Brant_Moore what might your idea be of a shorter reach stem
@Kool_k 3 жыл бұрын
Can someone help plz I've had the problem for years So if you put your front wheel between your legs and try and turn my whole stem turns without the wheel and I can't get it central and can move while riding does anyone know the tools and the way to stop this?
@Brant_Moore 3 жыл бұрын
I would take it to your local bike shop. There could be issues that aren’t obvious and can be unsafe.
@Kool_k 3 жыл бұрын
@Brant_Moore ok thx
@superMcCluck Жыл бұрын
"bottom load" isn't really a thing, but HALF-LOAD is
@BFELLY 5 жыл бұрын
48mm stems all day 😤🔥💯
@Brant_Moore 5 жыл бұрын
53mm here!
@BFELLY 5 жыл бұрын
@Brant_Moore love your videos man. Great content and your knowledge of BMX is awesome. I want more BMX news videos!!
@Brant_Moore 5 жыл бұрын
Really appreciate it man!! There will be one Friday!
@jacobjames1171 5 жыл бұрын
53 for me.
@BFELLY 5 жыл бұрын
Jacob James Im short and run a longer frame (20.75) so it feels good for me at 48 haha
@levigrafton6854 5 жыл бұрын
Ahhhh!!!!! math! Lmfao 5:14
@Brant_Moore 5 жыл бұрын
Haha math can be fun!
@luwiluwi3528 4 жыл бұрын
Same stem FIT stem. 🤘
@Brant_Moore 4 жыл бұрын
How do you like it?
@luwiluwi3528 4 жыл бұрын
@@Brant_Moore though man. Real carry the whole load. Oldstem best
@Brant_Moore 4 жыл бұрын
Glad to hear it
@seangoff9578 3 жыл бұрын
So ummm. Rise is measured from the bottom of the stem to a horizontal line through the middle of the bars. Not from the middle of the stem. Please put out a video or mention this as you're misinforming a lot of viewers here.