OMGZ Brushless Revo!!! :O Need some advice :D

[lincpimp]

You will want to use any of the mod1 pinion gears with the rcm motor mount. That mount places the motor closer (front to back) to the spur gear. Stock revo sour gear type is mod1 so any mod1 pinion will mesh properly with it. Keep in mind that most larger motors have 5mm shafts, so make sure you buy a pinion with a 5mm bore. Mike only sells 5mm bore mod1 pinions, and is really the only place to get them. They are all hardened pinions, which does not matter with the plastic spur gear on the revo.