Reviewed as "The Best Utility Cart Made," the OXCART utility cart offers those time-saving capabilities that make life better for homeowners, hunters, farmers and landowners. Now, convert your OxCart from 2-wheels into a 4-wheel bull to tow and help cushion and stabilize loads over rough terrain but not for lawns. Heavy-duty design walks over rougher terrain keeping all wheels on the ground, distributing weight over all four wheels and cushioning even top-capacity loads. Converts OxCarts Poly tub and Steel Mesh-Free Utility Dump Trailers from 2-Wheel into 4- Wheel Quads for Off-Road use only - not for lawns Design absorbs rougher terrain distributes and cushions loads more Note: Swivel feature is inoperative in 4-wheel position Additional tires sold separately match to current size and tread - max tire size on poly carts is 16 inches and steel mesh-free is 18 inches Kit includes walking beam set (powder-coated), center pins, manual, 6 washers and cotter pins For help at any time, reach out to the OxCart Customer Service Team by calling our toll-free number (844-2 OXCART (69-2278) or by emailing [email protected]; replacement parts can also be ordered online at OxCart's website.