This Marathon Tires Pneumatic Tire is the perfect replacement or upgrade for existing carts, building new carts or for a variety of other applications. Bore Diameter in. 3/4, Tire Size in. 24 x 2.125, Hub Width in. 3.3, Tire Type Pneumatic, Bearings Included Yes, Outside Diameter in. 24, Rim Type Steel spoke, Tread Type Aggressive, Load Capacity lbs. 250.