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Originally Posted by Clev

Forklift and EV motors weigh 60 to 125 pounds or more--of course they're going to handle more abuse. Wheel motors need to be lighter to reduce unsprung weight. Besides, EV motors mostly experience tortional stresses and shocks to the shaft. The impacts a wheel motor receive are equivalent to dropping it on its side, with only the tire between the asphalt and the motor. This means stronger bearings, casing and rotor assembly.

well said clev!