Different specifications, structure, degree of Truck tyre wear is not mixed use, otherwise it will affect vehicle handling and stability. In order to maximize the performance of the vehicle design, the best selection of the four wheels the same Truck tyre, at least the same size and structure of coaxial the Truck tyre. If you buy two new tires and the car left the two Truck tyre size and structure are the same, we recommend that you install the new tire to the rear axle. If only for a new tire, it is recommended that you put after the shaft, and the other three wear the lightest one in place also after the shaft.