I am intending to be in the high desert of Western US (Nevada and Utah) where summer temperatures on the road surface can be well over 100 degrees F. The MP motor(s) will be propelling a cart that I will be walking alongside of, not riding, as it goes up steep grades (6-9 percent). So traveling around 2 mph at relatively high power. Does the motor have an over-temp cutout or should I take precautions and monitor the hub temp and how hot can they be?