Martin Wheel 12X3.00 12-Inch General Purpose Wheel for Lawn Mower, 5/8-Inch Ball Bearing by 3-1/4-Inch Centered Hub Complete tire AND wheel assembly; Hub Length: 3-1/4 inch Centered | Bore: 5/8-inch ball bearing Non-highway use only Great replacement for a hand truck, dolly, wagon or general purpose use