Engines | ISX12 (EPA 2010) | Cummins Inc.

Gear Ratio Calculator

An engine’s performance in a vehicle is heavily dependent upon the rest of the driveline configuration. Please use this simple interactive gear ratio calculator as a tool to help plan your build for optimum performance, fuel economy, or the perfect balance to suit your needs.

Efficiency
Performance

Vehicle Information
or
Transmission Gear Ratios
Active Gear