Titan Wheel Accelerated Change Technology (ACT) wheel is designed to allow a service technician to change or rotate the rear tires on a mine haul truck in a fraction of the time. Designed for use on the outside rear wheel position, it allows the technician to rotate or change the inside tire without having to take off the outside rim. Two-piece lock rings release the tire assembly from the wheel. A double-lock system stops rotation of the side flange, which prevents expulsion of the flange and helps control tire slippage.