BMX Gearing Explained
Ever wondered why we use numbers like “53”, “54” and “55” for BMX gearing? Hopefully this video goes someway towards explaining how we come up with those numbers. This is the first draft of this video, so please give me your suggestions on how I can improve it. It’s a little confusing in the middle but I’ll iron out those bugs if you think I need to. Thanks.
starts at 3:48
Simple question here ‘
"What will make it easier going up hill" ?
a small front crank sprocket or a large crank sprocket ?
I have been asking this question in several videos and l can’t get a straight answer. Some tell me "small" front sprocket for going up hill, and some tell me "large" front sprocket for going up hill.
Which one is it ?
I’m only refering to the front crank pedal sprocket on a bicycle.
No changing of rear wheel sprocket either.
I thought this was a good and informative video, especially because it sparked some really good questions that I think a lot of BMXers have but aren’t sure how to ask.
Oh I’m running 48/12, lmao im running 80
Dude thank you for doing this video I’ve been out for 15years and had no idea what these guys were saying. Dude was like I run a 55 and I was like okay I run 44 16 lol
44 teeth…..16 teeth…..how many chain links do i need to have?….so it doesn’t keep slipping.
Sure that’s not for the crazydogggz?
Would the 20" wheel bike be very different if the tyre was 30mm on bike A , and a wide high wall 50mm tyre the numbers would come out very different on bike B ! What you should do is multiply the ratio dy the actual size of the wheel and tyre combined from ground to the top of the tyre, not just the wheel . As a small tyre on a 20" wheel will be very different to a wide fat high wall tyre on the same 20" wheel!
Bro. I cant stand to listen to your spit sloshing around in your mouth every 5 seconds. It’s so bad, once you hear it you can’t ignore it.
Lol I was like wow 55teeth lol
Is 44/18 good
if i had sprocket 25t can i buy a new 32t or i need a 25t
28/9 runs about a 62
55 really 56 if rounded up
I always thought 27/9 would be perfect, because 9 goes into 27. Guess I was right, ill have to try it.
Is 40 good or bad
try 44.9
Only suggestion: add parentheses around your gear ratio division! Otherwise very simple explanation
Sir sir, I need the toilet. (When teachers say "bare with me")
Oooo I learn something new!!!
183.6?
Crank arm length also factors in
My god 👎👎
😵💫🥱😴
MDAS : 16*20=___ divided by 44=____
this is hella boring and sounds like an ASMR video and I am sorry but your tung and mouth is like filled with water and it smacking and is not good but still no offense
I like my 36-16
My bike is gear of 3812×24=76 is this good?
I run right now a 33/18 and then you do 33÷18 that’s 1.83 and then you do 33÷18×20 that’s 36.66 it’s very short gearing I could only go 20 mph but I get from 0-18 mph in less then 2.5 seconds and it’s so fast at acceleration but horrible top speed but I’m going down to a 16t freewheel in the back to see if it will give a little extra top end I want to reach at least 25 mph in a very short distance! Eventually a 13t freewheel! I run 100psi tires too and I keep them at around 80 to 100 psi
I’ve just come across this vid after getting back into riding after 35yrs. Very well presented and helpful. Cheers
Is 74.75 gear inches alot
Very well explained. Thank you.
I have 40t in the front and 18t rear sprocket on my 20" BMX. Some ppl said if I change the rear sprocket to 12t, it will be faster and lighter. Is that true it will be lighter?
In my country.speed matters to most kids…they use 56t/8t on their ugly bmx bikes…
Very interestingly educative! Thank you so much for posting! Love the ‘ccent!
Thanks man
i have 52t at the front and 14t at the back
I have 48 front and 17 rear
Mine is exactly 172.787595947
The number equates it to a "penny farthing" style bike as well, for what thats worth. 55 gear inch will feel like pedaling a penny farthing with a 55 inch front wheel
Would a 29 tooth front sprocket and a 13 tooth rear sprocket pedal pretty fast and good for Street use not going to perform tricks but we’ll do bunny hops off and on just want to be able to Pedal fast
i have 54.48 XD
Oy. That was way to complicated for such dumb math. It’s not math though it’s mechanics… What about crank length?
Much much easier to say 44/16.
Imo 33 12 is the best and pefect gear for bmx.
My bike runs the same type of Gearing
I’m on 41
And what I was trying to find out was in between all those numbers that you’re talking about which one is the tighter gear yes I know all BMX bikes are easy to push down on a spin out your tires Tyler gear or is it all just measurements that don’t mean anything for you gearing
So 30 divided by 15 times 26 is 52 … is that a bad gear ratio for a 26 inch cruiser? 52
Great video
So its just a method for quantifying acceleration/resistance by using a single number rather than a gear ratio?