The replacement wheels that came with my kit are different than the wheels that were on my device so they did not work (rubbed on the sides of the cleaner). The original wheels have an offset groove for mounting the tires - these wheels have the groove centered and as a result, the inner part of the tire rubs on the chassis and the cleaner will not work. Plan on using the original wheels with the new tires if you are using this kit.The wheels rub up against the side of the unit. So it will not roll. A waste of money. I can't believe that they are that far off. I guess I should just buy a new one instead of rebuilding these things.I liked this product for its completeness. It is a well thought out kitAs expected.