Join Date: May 2001
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Re: How do big tires stress axles?
I would imagine torque is the big killer.
Your trying to turn bigger (fulcrum (center of wheel)is also the energy point, and is further from the load (road)) therefore there's alot of stress on the axle shafts.
As well as having a larger diamiter ( longer distance from the pivot point to the road) you have a heavier tire to spin.
Therefore as the end of the axle shaft (part in the differential) tries to wind up and spin, the end on the wheel resists, and the metal twists and torques.