Hign-concerned Chemical : None is_customized : Yes Material : Bearing Steel Model Number : B543-2RS MAX 397508-2RS 39.70x50.8x7.14 mm Brand Name : FUSHI Origin : Mainland China Certification : RoHS,None WHAT ARE MAX BEARINGS? Designed specifically for suspension pivots, FUSHI Bearings pioneered MAX type bearings for bicycles to address the challenges associated with mountain bike pivots. These bearings have 35-40% more load capacity than standard radial bearings. We accomplish this with a special design where the maximum number of balls are inserted into the bearing. The race grooves are deeper on these bearings for more lateral support for the twisting and multiple forces associated with mountain bike pivots. LLU seals give maximum protection against the elements, while keeping the 90% fill of Mobil XHP-222 High High Quality Grease inside. Designed specifically for suspension pivots, FUSHI Bearings pioneered MAX type bearings for bicycles to address the challenges associated with mountain bike pivots. These bearings have 35-40% more load capacity than standard radial bearings. We accomplish this with a special design where the maximum number of balls are inserted into the bearing. The race grooves are deeper on these bearings for more lateral support for the twisting and multiple forces associated with mountain bike pivots. LLU seals give maximum protection against the elements, while keeping the 90% fill of Mobil XHP-222 High High Quality Grease inside. DETAILS Item: B543-2RS MAX For Cannondale Lefty Closures: RS Sealed Structure: MAX, Full Balls, NO Retainer. Dimensions: 39.7 x 50.8 x 7.14 mm ID (inner diameter): 39.7 mm OD (outer diameter): 50.8 mm Width: 7.14 mm Quantity: 1 Lot = 1 PC Vacuum Packaging Grease They are characterized by excellent water resistance and load-carrying properties and help provide long-term protection against rust and corrosion. Bearing Installation and Removal