Originally Posted by aarcobra

I'll check out the Servocity and rapid gears.

32 pitch is what was used in early 1/12 (Jerobee and all) and some nitro 1/10 stuff, RC 10GT etc.

If you multiply the number of teeth by the pitch you get the pitch diameter (about half way between the OD and root of the teeth. So 2.620 OD minus
.100" (about the difference in dia between OD and PD as measured on an Associated gear) is 2.520 x 32 would be about 80 teeth. 2.520 x 24 would be around 60 teeth, much closer