1. Selection of wheel material. Generally speaking, supermarket shopping cart casters should be selected according to road conditions, wheel load and other conditions. For example, rubber wheels (PVC) are not resistant to chemicals such as acid and grease, while polyurethane and nylon are suitable for different environments; 2. Choice of hard and soft wheels: super polyurethane wheels, nylon wheels, and high-strength polyurethane wheels are suitable for indoor and outdoor ground driving ; High-strength artificial casters are suitable for driving on the ground that requires quietness such as hotels and hospitals; 3. The larger the wheels of the supermarket shopping cart, the more labor-saving. As a supermarket shopping cart caster, how to make customers more labor-saving is particularly important, because customers do not want to push heavy carts to buy products. Therefore, when choosing shopping cart casters, supermarkets must choose casters with large wheel diameters. 4. The temperature in the supermarket is relatively suitable, so when choosing casters, there are relatively few requirements for the temperature. However, in different places, caster materials suitable for different temperatures should also be selected, because strict conditions and high temperatures have a great impact on casters. If you are in the north, you should choose casters made of polyurethane. Experiments have shown that polyurethane can still rotate flexibly even at a low temperature of minus 45 degrees; 5. As a supermarket shopping cart caster, its bearing capacity must also be carefully calculated. If the customer buys relatively heavy goods, such as rice, the caster fails, which will affect the customer's shopping desire. To calculate the carrying weight, you must know the self-weight of the transport trolley, the maximum load and the number of single wheels used. You can apply this formula: T=E+Z/M*N; T=single wheel or the required carrying weight; E=The weight of the transport trolley Self-weight; Z=maximum load; M=number of all wheels and casters; N=safety factor (about 1.3-1.5).