CeramicSpeed Bottom Bracket - ALPHA BSA MTBA 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 cups ensure quick installation and a 10% weight reduction over previous generations. All CeramicSpeed BB

Part # 296237

Whether you’re training for endurance or pushing your limits in competition

Chain Tool - No

CAGE LENGTH One-Spec TOTAL CAPACITY 39T MAX FRONT DIFFERENCE 16 COLOR SERIES COLOR AVERAGE WEIGHT 262g MOUNT Direct attachment (conventional) NUMBER OF PULLEY TEETH 11 SERIES Ultegra GENERATION R8100 MAX LOW SPROCKET 34T MIN LOW SPROCKET 28T REAR SPEEDS 12

Extended adjustment mounting - up to 16mm fore/aft

DT 350 - 1454g

Product Specs

Ceramic Bearings

like Shimano HollowTech II

No more pressure inconsistency

and anti-reflective coatings to reduce distractions

Speedcore technology creates a Tubeless-Ready casing with multiple layers of reinforcement to provide superior puncture protection within a lightweight structure