Suitable for roll-in docks or boat lifts, this heavy-duty wheel is rotomolded from UV-stabilized polyethylene. This tough rigid wheel is stress, crack, and impact-resistant and provides excellent performance in low temperatures. Rolls easily over virtually any terrain and will not rust on the axle. Easily mounted on a 1-7/8" O.D. axle. 700-lb. capacity. Sold individually. 18" diameter x 6"W.