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Overall Gear Reduction |
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IMPERIAL Overall Gear Reduction The overall gear reduction is the RPM time the rolling radius of the loaded driving tyre divided by 168 times the vehicle speed in miles per hour
Where:168 = Factor RPM = Revolutions per minute of engine r = Rolling radius of loaded driving tyre in inches R = Overall gear reduction including both axle and transmission MPH = Vehicle speed in miles per hour Example:Find out overall gear reduction of a vehicle where the motor speed is 1680 RPM, the rolling radius of loaded driving tyre is 15 inches and the MPH is 15.
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METRIC Overall Gear Reduction The overall gear reduction is the RPM time the rolling radius of the loaded driving tyre divided by 168 times the vehicle speed in miles per hour
Where:2651.51 = Factor RPM = Revolutions per minute of engine r = Rolling radius of loaded driving tyre in millimetres R = Overall gear reduction including both axle and transmission KPH = Vehicle speed in kilometres per hour Example:Find out overall gear reduction of a vehicle where the motor speed is 1680 RPM, the rolling radius of loaded driving tyre is 381mm and the KPH is 24.
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