question on gearing...

  • Discuss question on gearing... in the BMX Bike Tech forum in area BMX-Forum Community; hey what gearing would feal similar to a 16/39 with a 9 tooth driver. Thanks ...
S m A 413

S m A 413

New Member
question on gearing... post #1
hey what gearing would feal similar to a 16/39 with a 9 tooth driver.

Thanks
 
J

Jazone

New Member
question on gearing... post #2
A 22/9 setup would be the same (2.4)
 
S m A 413

S m A 413

New Member
question on gearing... post #3
wow really? i was thinking around 24 25...how did you find this out?
 
J

Jazone

New Member
question on gearing... post #4
You divide them by each other to get the ratio, eg 39/16= 2.4375 & 22/9= 2.44.
That ratio will be easy to peddle though, most people aim around 2.7 - 2.8, eg 30/11 (2.72) 25/9 (2.77).
 
R

Ryno149

New Member
question on gearing... post #5
wow really? i was thinking around 24 25...how did you find this out?
Simple math, my friend. You take 39/16 to find the gear ratio which is 2.4375. Then you take 9 x 2.4375 to figure out what you need, which ends up being 21.93, so 22.
 
S m A 413

S m A 413

New Member
question on gearing... post #6
thanks
 
S m A 413

S m A 413

New Member
question on gearing... post #7
do i have to do anything besides take some links out to run that low of a gearing?
 

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