This item is a new replacement 15" x 4" rotary cutter segmented rubber tire. Please also look carefully when comparing to other sellers. SPECIFICATIONS ** 15" x 4" Laminated tire ** 4 Bolt rim ** Center hole for hub to fit is 3-5/8" ** 3-1/2" clockwise center hole to center hole on mounting holes in rim **End of hub to end of hub where the bolt goes through is 5-1/4" wide **Greasable with replaceable knock in bushings ** Heavy duty cast hub with for 1" axles ** 1" X 8" axle bolt with nylon lock nut. Your fork will more than likely have a 1" axle hole or 3/4" axle hole. We sell both but make sure before you order if you are unsure. We sell the complete assemblies, tire, tire with hub & axle bolt. Look in our store or get in touch with pro parts place!