New with zerk fitting Compatible with: Most zero-turn lawn mowers and garden tractors. Wheelbarrows, garden carts, hand trucks, generators, air compressors, wagons, pressure washers and other types of outdoor power equipment. Specifications: Tire Diameter: 13", Tire Width: 4.6", Rim Diameter: 6", Hub/Bore Size: 3/4" & 5/8", Centered Hub Length: 3.25", Max Capacity load: 500 pounds High Quality: Made of solid polyurethane foam, puncture proof, durable and long lasting. The smooth and seamless tread will pamper your lawn; Load characteristics are similar to pneumatic tires, with the bounce and feel of pneumatic tires but no punctures. Note: Our tires are not compatible with the 13x6.50-6 model. Do not use on roads, it will affect the appearance of the tire but not the use. Tires will develop flat spots if parked for a long period of time, but will repair during use.