The specifications and models of cart wheels are 6 inches, 10 inch, 12 inch, 14 inch, etc. Different types of cart wheels have different application scenarios, for example, 6 inches is suitable for light carts, such as shopping carts and folding carts. 10 inch is suitable for medium-sized trolleys, such as logistics trolleys and electric bicycles. 14 inch is suitable for heavy trolleys, such as warehouse trolleys and industrial trolleys.