Oregon 72-098 Anti-Scalp Deck Wheel 6-Inch by 1-1/2-Inch AM107560 6-inchx1-1/2-inch, Bearing I.D.: 1/2-inch Hub: centered/plastic, Hub length: 1-3/8-inch Terrance wheel for 48-inch, 54-inch, 60-inch and 72-inch