the numbers mean how far the wheel travels from one rotation of the cranks.. i think it is in inches :confused: ? so on a 20x1.75 tyre with 39-14 (what i run) it equals out as 53.6 im pritty sure
hey im just wondering what i should do. im starting 4x and i dont know what bike to get. is a dirt jumper okk?? do u have to run gears or can u run single speed because i pefure no gears. im turning 13 so ill probly need a small.
i was looking at a black market three57 would that be okk??
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