1) The material, shape and size are correct and reasonable, can give full play to the function of the tire, interchange with the tire, and have international versatility;
2) When driving, the longitudinal and lateral vibration is small, and the imbalance and moment of inertia are small;
3) Under the premise of lightweight, it has sufficient strength, rigidity and dynamic stability;
4) Good separability from axle and tire;
5) Has excellent durability;
6) Its manufacturing process can meet the requirements of stable product quality, low cost, multiple varieties, and large-scale production.