Nukeproof Enduro ABEC5 V2 MTB Hub Bearings (61805)These bearings are specifically designed for use with the Nukeproof Horizon and Neutron V2 range of wheels. They feature hard-wearing, high carbon chromium alloy races with graphic/nylon ball retainers. This makes them incredibly durable and more than capable of handling all the intensity that comes with shredding the mountain bike trails. These superb bearings set the benchmark for high precision bearings.ABEC-5 LinePart of an updated ABEC-5 line of wheel hub bearings, these 6805 / 61805 bearings are the revised LLU/LLB dual seal model. The ABEC-5 Dual Seal bearing places a LLU full contact seal on the outside facing surface of the bearing, while the Inboard facing LLB medium contact seal offers less drag. Their specific seal increases the lifespan of the bearings and offers excellent performance. High precision balls are within 5/1,000,000’’ round. These are military level specification, used for precision equipment. R-64 hardness, of the highest grade.The Nukeproof Enduro 61805 ABEC5 V2 Hub Bearing Pair is only suitable for converting the front hub of the Nukeproof Horizon V2 and Neutron V2 from 15mm to 20mm axles.These bearings will also fit many other hubs which use this size of bearing.Features: Material: High Carbon Chromium Alloy Races with Graphite/Nylon Ball Retainers Bearing Code: 6805 / 61805 Dimensions: 25x37x7mm ABEC: 5 Grade: 10 Seals: LLU/LLB Grease: Mobil XHP 222 Nukeproof Part Number: NUKHORV261805P Approx Weight: 20.4gBuy Nukeproof Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.