Perfect for heavy duty, outdoor use - trucks, farms, motor homes. 5-1/4 in. x 1 5/16 in. W tires will not sink into soft ground. 2 1/2in. swivel bearings. 25% larger and 15% thicker than than 'The Bone'. Super tough injection molded polymer body with ribbed bottom for greater stability. 500lb. capacity and 2-5/8 in. ground clearance. Perfect for big jobs and big guys! Dimensions 47in.L x 25-1/2in.W x 7-3/8"H. U.S.A.