Boss Bearing Y-ATV-FR-1001-1G1-1 Rear Wheel Bearings and Seals Kit Yamaha YFM660 Grizzly 2002 Includes: 2 Bearings and 3 Seals This kit will repair one wheel. If you need to do both rear wheels, please order 2 kits. All Bearings feature low-drag double lip rubber seals on both sides. Double sealed bearings outperform metal shielded bearings because they keep out dirt and water. All Seals are double lip and rubber encapsulated with internal stainless garter spring for maximum sealing performance. A FREE helpful installation tip sheet will be included in all wheel and axle kit purchases.