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The FVT motors and the YASA motors are direct drive, and that torque is at the output shafts. On the YASA motor torque / efficiency graph, it shows it has that 750Nm (533ft/lbs) is available as low as ~100RPM. That would mangle most gears, and gears that are strong enough would lose power through friction. Heck, the YASA has peak efficiency of 94-95% without any gears!
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