Turf Tread Tire on a 3 Centered Rim with Grease Zerk, Various bearing sizes available, The perfect tire for your riding lawn mower, 15x6, 506 Flat Free Tire with Turf Tread, Outside Tire Diameter: 13, 9, Width: 6, 3, 34 Precision Ball Bearings, 3 Centered Hub, SKU: MTNI055