The m140 is more of a speed motor, and the m160 is torque. I'm not sure how the speed of the m160 compares to the Magnum, but it sure as heck hauls. I run an m150 with G&G Hyper-Torque Gears (somewhat equivalent to double torque) with a Mini Elite 12v. It pulls it ok, but i really need a bigger battery to test.
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