the spur 78T is a 48 pitch right? can i use any pinion, or it must be a 48 pitch pinion? i noticed the given 22T pinion that came with the custom kit is a little bit smaller in diameter compares to my tamiya 22T????
the internal ratio for the mr4tc is 2.2 right? so currently my 78T spur divide 22T pinion = 3.5454 times the internal ratio 2.2 = 7.79999.
if i use 20T pinion that gives me 8.58 ratio...much better for my 11T motor, right...esp. for tight track?
is there a guideline that i should follow? like 12T=>7.5 ratio above; 11T=>8.3 ratio & above;10T=> etc etc. ?????
pls advice me. thx