Ensure your semi truck is Ready for the Road Ahead with accurate mileage readings, with the Stemco Datatrac Programmer. Due to its ability to program a hubodometer to the exact revolutions per mile for a tire size, this replacement device is able to help track the overall distance that a vehicle has traveled. Built with a large, easy-to-read LCD display for simple and precise data retrieval. FleetPride is your First Click in Heavy Duty .