Metric / Inch Tire Size Converter
Enter your tire size information into one side of the tire size converter below to convert metric tire sizes to inches or inch tire sizes to their metric equivalents.
( Full Calculator: Metric To Inch Tire Size Converter )
Ring and Pinion Gear Finder
Enter your original tire size and gear ratio into the form below along with your new tire size to find your recommended ring and pinion gear ratio.
( Full Calculator: Ring and Pinon Gear Set Calculator )
Gear Ratio Calculator
Enter the number of teeth found on your ring gear as well as your pinion gear in the boxes below to calculate their combined ring and pinion gear ratio.
( Full Calculator: Ring and Pinon Gear Ratio Calculator )
Crawl Ratio Calculator
Enter your transmission, transfer case, and axle gear ratios into the left side of the form below and press the calculate button to find your final crawl ratio.
( Full Calculator: Drivetrain Crawl Ratio Calculator )
MPH Offset / Corrected MPH
Enter your original and new tire sizes into the table below and select a base speed to calculate your speedometer's offset and your vehicles actual speed.
( Full Calculator: Vehicle Speed Offset Calculator )
Engine RPM Calculator
Enter your axle gear ratio, tire diameter, vehicle speed, and transmission gear ratio in the blue fields and click the calculate button to find your engine RPM.
( Full Calculator: Engine RPM Calculator )
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