kellertx5er wrote:
What most people fail to realize about this issue is that there are rotational (centrifugal) forces acting on the tire structure. These forces increase with the SQUARE of the speed. So, while 70 mph vs 65 mph is only a 7.7% increase, the centrifugal forces increase by 16%. At 72 mph the increase is 22.7%.
Something to keep in mind when deciding how much is too much.
But why are all sizes of ST tires rated at 65 mph regardless of their diameter and thus different rotations per mile? Theoretically a 16" st tire should be working less than a 14" tire at the same load.
