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What are the best gear ratio's on a park bmx?

PB Forum :: BMX (20")
What are the best gear ratio's on a park bmx?
Author Message
flag riish
FL
Posted: May 5, 2010 at 2:59 Quote
im currently on 25-9 and quite like it, it's decent for getting super fast, but isn't too hard to get around on (i have to ride between spots normally)
flag MOOREJ
Posted: May 5, 2010 at 7:23 Quote
Finding 25/9 to be too easy myself, topping out all the time. Like to try a 27/9 or 28/9 setup.
flag spyke
Posted: May 5, 2010 at 10:06 Quote
MOOREJ wrote:
Finding 25/9 to be too easy myself, topping out all the time. Like to try a 27/9 or 28/9 setup.

I run 28-9 gearing,you will love it if you find 25-9 too easy.It's more effort to get going though.
flag customsunday
Posted: May 5, 2010 at 10:43 Quote
culley wrote:
anything to 8 is retarded. unless you're rich and can afford to replace your driver every month, and you're all a bunch of little kids and I really doubt that is the case.

28-9 IMO.

i have a proper magnalite cassette hub that is 8 tooth and it is still perfect, and ive ran it for months and months. Dont bag on something you dont know anything about.
flag TwentyCent
Posted: May 5, 2010 at 11:05 Quote
EROCK24 wrote:
@TwentyCent, ratio really has nothing to do with it. You can run gears directly together but to answer what I think your asking is around 13-13.5 inches. Many companies consider 13.75 slammed.

Well not the ration itself, but the combination of different sprocket sizes and CS length will determine if you can slam your rear wheel or not...I personally run 28-10 on a 13.75" CS (I think) and when (try to)slam my rear wheel, the chain has a bit too much slack, but not enough to remove a link in the chain.
flag riish
FL
Posted: May 5, 2010 at 16:38 Quote
TwentyCent wrote:
EROCK24 wrote:
@TwentyCent, ratio really has nothing to do with it. You can run gears directly together but to answer what I think your asking is around 13-13.5 inches. Many companies consider 13.75 slammed.

Well not the ration itself, but the combination of different sprocket sizes and CS length will determine if you can slam your rear wheel or not...I personally run 28-10 on a 13.75" CS (I think) and when (try to)slam my rear wheel, the chain has a bit too much slack, but not enough to remove a link in the chain.

try a half-link.
flag TwentyCent
Posted: May 5, 2010 at 17:47 Quote
That's what I have. I just wondered if anybody had a "guide" with CS length and gears that are slammable. I know that 25-9 works well with something like 13.25 for example
flag azzazz7
Posted: May 5, 2010 at 21:42 Quote
bmxerdude1 wrote:
maybe imp it wud proboly be:
25-8
25-9
or
23-8...
i run 25-8 and thats f**king dope ay
flag jimbo33000
Posted: May 31, 2010 at 18:04 Quote
divde the larger number by the smaller one then multiply by 20...55 gi is standard bmx gearing so:
44/16x20=55 44/16 was the original bmx gearing...55 is standard

25/9x20=55.55 so its essentially the same as standard just more clearance and is lighter

if you notice alot of people are arguing over the same (roughly) gear ratios just using larger or smaller amounts of teeth

i would go 28/9
flag KodyTHPS
Posted: Jun 8, 2010 at 14:05 Quote
28/8 thats the way to go.
flag mrnozzer
Posted: Jun 8, 2010 at 14:15 Quote
KodyTHPS wrote:
28/8 thats the way to go.
lol that sounds hard i ran 28-9 for a while cause i couldn't afford a new sprocket and those few teeth make a differnece
flag jake666bmxer
Posted: Jun 8, 2010 at 18:16 Quote
30/9 or 31/9 or 29/9
flag KodyTHPS
Posted: Jun 10, 2010 at 21:58 Quote
see jake knows where its at. hard gears ftw

 


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