Quote:
Originally Posted by davepenny
hi mate the macnum runs 86-19=11.768 and the mad rat runs 80-21=9.904 sorry if i sound stupid but why is there this much dif have all ready burned out 3 motors clash 21 27 reedy and tamiya blake can thanks for your reply.
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if you are burning motors you are geared wrong also your calculations are wrong as that is the internal ratio and you need to take into account the size of the larger truck wheels