Castle Creations motor and ESC combo recommendations for the Arrma Limitless V1.

Monster X 8s w/1520-1650kv - 24 pinion/46 spur* on 6s = ~65MPH
Monster X 8s w/1717-1650kv - 20 pinion/46 spur* on 8s = ~75MPH. Watch temps, limited runs.

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.
*May require optional hardware to achieve recommended gearing.