Deck Roller / Simplicity 1668487Pack Size:1Simplicity 1668487SM, Simplicity 1668487NHC 226-0177, Ratio Parts 031-071, Sunbelt WL-19, Sunbelt B1WL19Simplicity 3100, 4211, 4212, 4108, 5200, LTG12 and RegentBore: 5/8 ", Tread: Smooth, Wheel Size: 3 1/2, Hub: 1 11/16 "