9X3.50-4?? FLAT FREE LAWNMOWER TIRE AND WHEEL ASSEMBLIES – This tire and wheel assembly is a perfect replacement for lawnmowers with 9.29 inches tire diameter, 3.50 inches tire width, 4 inches rim diameter, 3/4 inch bushing/borehole size, and 4 inches centered hub length. Please check your existing tire??s sidewall to ensure that this is the right tire and wheel replacement for your lawnmower. FLAT-FREE POLYURETHANE TIRE ON WHEEL AND ADAPTER KITS – Our 2-pack kit includes 2 pieces of 9X3.50-4?? flat-free PU tire and wheel assemblies with grease fittings and a universal adapter kit that allows assemblies to be mountable on a wide variety of wheeled equipment. The adapter kit includes 2 pieces of nylon spacers, and 4 pieces of steel washers. COMPATIBLE SOLID RUBBER TIRE REPLACEMENT GARDEN CARTS – These tire and wheel assemblies are most often used not only on walk-behind lawnmowers, wheelbarrows, hand trucks, garden carts/trailers, air compressors, generators, and other types of whe