Calculate how tire size changes affect effective gear ratio, RPM at speed, and impact on acceleration and fuel economy.
Larger tires produce more speed per RPM but reduce acceleration. Smaller tires have the opposite effect. Enter axle ratio and gear ratio for precise RPM calculations.
When fitting larger off-road tires, you may need to re-gear the axles to restore original performance characteristics.
The effective ratio change shows how much your gearing has effectively changed due to the tire size difference.