Originally Posted by Nautilian
-EVO 5 & TRF 415MSX
-Surface is tar with medium -> high traction
-Tamiya rubber B3 tires with medium inserts
-GP 4300mA batteries.
You got good equipment.
I would start with 33 (I think those 23T tamyia motors are higher torque as opposed to RPM). If the motor come off cold after an entire pack, then up it one tooth.