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four-piston hydraulic disc
Designed for both 10-speed and 11-speed chains
even in challenging conditions
while the durable exterior withstands the rigors of regular use
664mm² surface area for maximum power transfer and stability
CeramicSpeed BB ALPHA Bottom Bracket - T47, 86mm, For 24mm/Shimano Spindle, Gravel, Black Default:Default four-piston hydraulic discA 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
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