CSGNetwork.com Free Information

Tire Size Calculator

This converter requires the use of Javascript enabled and capable browsers. These calculators are designed to give the approximate tire size (diameter from ground to top of the tire while mounted on the vehicle), based on data entered. That data consists of the ring gear and pinion gear ratio, the target speed of the vehicle and the transmission final gear ratio. The default values are for a typical V8 small block Chevrolet vehicle, however you may enter any legal value you wish. The first calculator assumes you want all the possible tire size change reflective values. The changes show what a tire size change would do to speed. While the math is exact, tires only come in certain sizes so you would need to select the closest possible size to your needs. The second calculator shows the required tire size for the values you entered. The higher the RGP ratio, the lower the top end speed but faster acceleration and more pulling power. The same is true of the transmission final gear ratio. Although there is a point of diminishing returns, the larger the tire diameter, the higher the potential speed. We do assume safe tire air pressure and tread. The calculator does not take into consideration any drive train loss, road and weather conditions or driver skills. The calculated results are displayed; the higher the engine RPM, the greater the potential speed at the cost of fuel, heat, friction and engine longevity. We urge you to drive safely.

Designation
Number
Various Tire Size Change Calculations
Required Data Entry
Ring Gear and Pinion Ratio (3.08, 3.55, etc.)
Engine RPM
Target Vehicle MPH
Transmission Final Gear Ratio (2.54, 1.43, 1.00, etc.)
   


Calculated Results From Change Of YOur Entry
Speed Changes Tire Size Changes
A MPH Change To MPH (-6%) Inches
A MPH Change To MPH (-3%) Inches
Tire Height - Your Entered Values Inches
A MPH Change To MPH (+3%) Inches
A MPH Change To MPH (+6%) Inches
Designation
Number
Tire Size Calculation Manual Entry
Required Data Entry
Ring Gear and Pinion Ratio (3.08, 3.55, etc.)
Engine RPM
Target Vehicle MPH
Transmission Final Gear Ratio (2.54, 1.43, 1.00, etc.)
   
Calculated Results
Tire Height Required Inches
Updated 8.15.11


Leave us a question or comment on Facebook
Search or Browse Our Site
Free Information Calculators and Converters

International Copyright Violation
Registered® Trademark™ and Copyrightę 1973 - CSG, Computer Support Group, Inc. and CSGNetwork.Com All Rights Reserved