Cleaning Robot Tire. [Applicable Models] : Braava 380T, 390T, 375T, 380, 390, 320, 321, Mint Plus 5200c, 4200 are available. You can replace this tire on the Braava Wheels very easily. No More take off the wheels, No More open the Braava cover, either. No More need crazy glue, pincer or nipper. We only need free hands with "Cleaning Robot Tire" Strong and Luxuary designed. Designed optimum pattern, thickness, size and for easily replacement. Researched and Developed for the details during 300 days!!