ORIGINAL: ben805
my TT01D came with Tamiya Sport Tuned motor, ran 19/61, upgraded the motor to 27T P2K2 Pro and still prefer the 19/61 combo, I would say anywhere from 19~21 with 61 spur(stock size) is fine.
can be used even an 20...or 18(even number)...on the 61?...or it's a must to stay on odd number size ???