Originally Posted by Dave H

Highly unlikely that higher voltage with same gearing will run cooler, far more likely to run hotter. Even with the same motor geared lower the motor temps will likely be higher. While the top speed might be close the higher voltage will have higher power capability getting there. Caveat is the way brushless motors react to gearing, and driving style so it’s difficult to be absolute.



Only true is the load is changed. Same load, higher voltage drives more amps.

Gearing can help some, but generally the best way to realize the potential benefits of higher voltage is to also change to a lower kv motor.