Tires, Gears, MPH and RPM

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Tires, Gears, MPH and RPM

Post by forum-guru » Wed Sep 13, 2017 4:08 am

A common 4x4 application is an upgrade to larger-than-stock tires. Once completed, this change immediately alters vehicle speed at a given rpm, rpm at a given speed, and effective gear ratio, which in turn affect both acceleration and fuel economy. Tire size, gear ratio, mph and rpm weave an intricate pattern of performance. Change one and all four are affected.; knowing any of the three, the fourth can be easily determined. The following four formulas illustrate the point: ... ph-rpm.htm
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