My 285/70/17 tires are dead on at 2595. A hand held gps will help adjusting the numbers and verifying correct speed. The EVO allows you to adjust the speed limiter up or down. Been up to 127 so far with alot of rpm's left .
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!