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  RPM & Tire Height Calculator
RPM CALCULATOR
Enter Ratio, Tire Height, and Speed (mph) then click calculate for RPM results.
 
Ratio Tire Height (ln.) Speed (MPH)
 
Auto* AOD* Manual* 5 Speed*


* Auto = D in an AOD
* AOD is calculated at .70 transmission ratio
* manual = 4th in a 5 speed
* 5 speed is calculated at .80 transmission ratio

RECOMMENDED TOWING RPM
4 cyl2200-3200Dodge Diesel1400-2200
6 cyl2000-3000GM Diesel 6.2L1800-2800
Ford 6.0L1900-2400Big Block1600-2600
Ford Diesel (Non-Turbo)1600-2500Small Block1800-2800
Ford Diesel (Turbo)1400-2200

TIRE HEIGHT CALCULATOR
Enter Aspect, Tire Width and Wheel then click calculate for Tire Height results.
Width Aspect Wheel Gear Ratio

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