Castle Creations motor and ESC combo recommendations for the Team Associate SR10.

Sidewinder w/1406-4600kv - Stock gearing (18/87)  on 2s = ~36MPH
Copperhead 10 w/1412-3200kv - Stock gearing (21/87) on 3s = ~46MPH
Mamba X w/1415-2400kv - 27 pinion/75 spur on 3s = ~52MPH

Note: All speed estimates are with stock tire diameter, high quality batteries and appropriately sized battery connectors.
Always monitor ESC, motor and battery temperatures on new setups or when changing gearing or batteries.