Truck tyre dynamic balance should be checked regularly. Truck tyre balance is divided into two kinds of dynamic balance and static balance. Dynamic imbalance will swing the wheel, so that wave-generated Truck tyre wear; static unbalance will produce bumps and jumps, often have to make Truck tyre flat spot phenomenon. Therefore, regular testing can not only extend the Truck tyre balanced life, but also improve the stability of car when driving, avoid driving at high speed due to Truck tyre swing, jump, out of control caused by traffic accidents.