http://tinyurl.com/mjfhfquOregon 72-311-1 Anti-Scalp Deck Wheel 5-Inch by 2-5/8-InchProduct Review Click on the link for more reviews6032995-inchx2-5/8-inchBearing Inside Diameter 5/8-inchHub: offset/plastic, width: 2-1/2-inchFits 38-inch, 40-inch & 50-inch decks