[speedemall]

Originally Posted by jhautz

Gotta have more info to make a recomendation. Motor? Battery? Tires size?

http://scriptasylum.com/rc_speed/_solver.html

you should be able to plug your info into this and figure out a good starting point for pinion size.

2650kv,4200 5s 30c,stock 1/8 tires and wheels.