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Working out gear ratios.

2K views 4 replies 2 participants last post by  J_Rod 
#1 ·
Hey guys So I have a 26" dirt jumper which is basically a bmx setup.and I can't figure out the gearing and don't want to waste money on trying multiple setups. So on my bmx I have 28t sprocket and a 9t driver and on the dirt jumper it's a 27t Sprocket with 9t driver. It was 27-12 but it was too easy and now it's too hard Just wondering if anybody knew a formula to calculate 26" to 20"?
 
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