CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For 24mm/Shimano Spindle MTB BLK CheckoutTitle=MSW 6 Stem - 100mm AB0031: The eleven tooth upper

AB0031: The eleven tooth upper and twelve tooth lower size and profile with 5mm bolt-holes are designed as an upgrade for most 11 speed Shimano GRX derailleurs

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8 inch allows for bikes of different sizes

Crown-465mm Brake Mount Disc Only (IS) Dropout 10x100mm Color Black

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CeramicSpeed BB ALPHA Bottom Bracket - PF30 73mm For 24mm/Shimano Spindle MTB BLK CheckoutTitle=MSW 6 Stem - 100mm AB0031: The eleven tooth upperA bottom bracket built to outlast your frame BB ALPHA features hardened stainless steel races hand built with grade 3 Silicon Nitride ceramic balls custom engineered seals and precision dust covers delivering up to 500% better moisture protection while still providing ultra low friction performance. The simplified spacer tube design and lighter 7075 aluminum cups ensure quick installation and a 10% weight reduction over previous generations. All