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Gearing Formula

Calculating tire diameter: Circumference divided by 3.1416

*Note: Tire diameter is a straight line measurement from any point on the tire's circumference, through the center, to the opposite point on the tire's circumference. Radius = diameter divided by 2

Torque =Brake HP x 5,252

Miles Per Hour=RPM x Tire Diameter(in inches)
Gear Ratio(final) x 336

RPM=MPH x Gear Ratio(final) x 336
Tire Diameter
Posted by Wayne Clayton


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