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RPM Calculator
   Enter Ratio, Tire Height, and Speed (mph) then click Solve to calculate RPM


Recommended Towing RPM
4 cyl 2200-3200
6 cyl 2000-3000
Big Block 1600-2600
Small Block 1800-2800
Ford 6.0L 1900-2400
Ford Diesel (Non-Turbo) 1600-2500
Ford Diesel (Turbo) 1400-2200
Dodge Diesel 1400-2200
GM Diesel 6.2L 1800-2800
GM Duramax Diesel 1800-2400


Transmission Gear Ratios   Transmission Gear Ratio Chart   Transmission Gear Ratios

Tire Height Calculator


Calculators designed for Internet Explorer only.
Randy's Ring & Pinion makes no guarantee to the accuracy of calculations. Please email with any calculation errors.
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