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           For Carb. CFM info and calculators, CLICK HERE!

Find RPM
MPH:  Transmission Ratio:
 
 Axle Ratio:   Tire Diameter:
RPM:

Find New Gear Ratio With New Tire Size
New Tire Diameter:   

Old Tire Diameter:   		 Current Gear Ratio: New Gear Ratio:
Changed gears or tires? This calculator can help...

Find MPH
RPM:   Tire Diameter:
  Axle Ratio: Transmission Ratio:  		 MPH:

Convert P-Metric Tire To Tire Diameter Inches
Example: 195/75R15
/   R 		Tire Diameter:
Wondering how far out your speedo will be after the tire size change?

Speedo Converter
Original Tire Diameter:   

New Tire Diameter:   		 Speedometer Reading (MPH): Corrected MPH:
Now your read to burn some rubber, CLICK HERE for our 1/4 mile h.p. calculator!