TruePower 40-4042 Flat Free Tire on Wheel with 3" Centered Hub Both 3/4" & 1/2" Bearings & Spacers 13x5. 00-6" tire. 12.5" tire diameter. 4" tire width Flat free tire made of solid, Polyurethane foam. Non-marking 3" CENTERED hub. 3/4" ball bearings with 1/2" spare ball bearings includes grease Zerk Perfect for hand trucks, brick Carts, generators, pressure washers, garden Carts and more. Also works great in both rigid and swivel casters 400 lb load capacity. Not for highway use