I am running a savage xl on 7.7 CEN Genesis wheels, so I went with a hardened16t pinion but I am not sure which spur to use. I have 6s lipo's and a 2000kv leopard motor on it. I have fitted the hardened flux gears and a heavy duty slipper spring.
The spurs I have to hand are a new looking plastic 55t and a steel looking 47t, looks ok but the slipper pad is worn out so I have my doubts. Both came in a job lot.
Any help would be appreciated.