Bike Crank
what kind of crank can i put on my 2009 diamondback bmx bike?
i purchased a 2009 bmx diamond back grind. (thats the model name) and i was wondering if there is a smaller crank that will fit on my bike. and one that has the matching gearing ratio, thanks guys! first one to find the correct gets ten points!!!
The original crankset the 2009 DB Grind uses is 42T. Its rear cog is 16T. Actually if you are good at maths and divide 42/16 you get 2.625. This ratio if compared with the 25/9 set, there is some difference. 25/9's ratio is 2.75. The closest sprocket size you can get to reach this ratio is a 44T with same ratio (of 2.75, same as the 25/9's).
Now, if you want to get smaller set, you will have to change your rear cog which requires a lotta budget...
Concluding, the difference is so small, that by my side, changing to a bigger, 44T, or buying a whole new set is worthless. Save up my friend!
A lil info:
My Haro F1 2006 used to have a 44/16 set. I changed to 36T aluminum sprocket, and actually this is a f*cked up ratio but drives goood!
Hopefully i helped you!
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