Gear Ratio Selector - Jegs High Performance

3. Engine RPM at Cruise Speed Example: If you want to Cruise at 60 MPH at 2000 RPM and your Tire Diameteris 30”, the Gear Ratioyou need is a 3.00 Formula to calculate Gear Ratio based on speed RPM _____ X Tire Diameter = Ratio _____ MPH X 336 _____ 2000 RPM X 30” Tire Dia. = 3.00 60 MPH X 336 ................
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