Reduce abnormal noises: Regularly replacing worn walking wheels helps reduce the machine's abnormal noise and enhances user experience. Reduce the Risk of Malfunction: Regularly replacing the vacuum cleaner's wheels helps reduce wear and cracking, preventing the device from getting stuck or stopping. Improve Cleaning Efficiency: Regularly replacing the vacuum cleaner's wheels helps the device run smoothly and improves cleaning efficiency. Reduce Floor Wear: Worn vacuum cleaner wheels can easily scratch the floor, and regularly replacing the wheels helps reduce floor wear during cleaning. Compatible for Ecovacs ，Compatible for Deebot， DX9G Robot Vacuum Cleaner Parts