Harper Trucks WH55P mold-on rubber hand truck wheel features ball bearings which provide easy-to-push, smooth, stable motion for your hand truck. Mold-on rubber wheels are solid rubber with little or no tread, which makes this wheel ideal for the heaviest loads. Wheel is 8-Inch x 2-1/4-Inch with a 2-1/4-Inch poly hub for a 5/8-Inch axle. Since 1940, Harper Trucks" mission has been to sell the highest quality products in the market. We have grown from a small, regional metal fabricator to the largest hand truck manufacturer in the world. As the world"s largest manufacturer of hand trucks, Harper makes one of every three such trucks sold in the United States. Harper Trucks are manufactured in a plant of 400,000 square feet with full robotic and new composite-injection capabilities.