This polyurethane tire is perfect for Vermont carts marina carts beach carts and lawn and garden carts. It is easy to install and will allow you to use your cart without ever having flats. 20x2.0 Flat Free Lawn Garden Marina Cart Tire. Ribbed Tread. 2.4375 Centered Hub. 3 4 Standard Ball Bearings. Mounted on a Black Nylon Rim. 18.5 Actual Overall Diameter.