Gear Ratio Calculator. This calculator is useful for planning your rig, allowing you to see what kind of performance to expect from different combinations. Step 1: Select transmission from the drop down list or, if it's not in the list and you know the gear ratios of your transmission, enter them below. Use this calculator to determine your gear ratio and vehicle’s speed in any gear and any engine RPM for best performance. Scroll through the list of popular transmissions to find yours. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. Visit Edmunds.com Car Forums to discuss car buying, selling, repairs, maintenance and all things automotive! Search discussions by make, model or topic. 2005 marked the birth of the Axial brand, and shortly after, thoughts about the first SCX10™ began, with development wrapping up in 2008. The SCX10™ was introduced to the world as a builders kit, paving the way, or better yet, raising the bar for a new generation of scale trail enthusiasts.
Current Tire
New Tire
Difference
Diameter inches (mm)
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Width inches (mm)
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Circum. inches (mm)
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Sidewall Height inches (mm)
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Revolutions per mile (km)
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Speedometer Difference
Speedo Reading
Actual Speed
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Gear Ratio Top Speed Calculator
Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35
2.73
2.94
3.07
3.21
3.31
3.42
3.55
3.73
3.91
4.11
4.27
4.56
4.88
5.13
5.29
5.38
5.71
6.17
7.17
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0
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Gear Ratio Tire Size Speed Calculator
Similar to the Miata tire calculator and 1010 tire calculator. Works with motorcycle tires, car tires...all sizes & types.
