The BB ALPHA is a bottom bracket engineered to outlast your frame, featuring hardened stainless-steel races hand-built with grade-3 Silicon Nitride ceramic balls. Custom-engineered seals and precision dust covers deliver up to 500% better moisture protection while maintaining ultra-low friction performance. The internal ball bearing race has been redesigned to provide additional support, allowing the bearing to better handle pre-load. Custom-made light contact seals with stainless steel backing strike the perfect balance between efficiency and protection, delivering the trademark low-friction CeramicSpeed performance. The bearing design positions the bearings further out in the cup, allowing the stiff POM plastic dust covers to sit flush with the outer edge of the cup. This makes it increasingly difficult for debris to penetrate the dust cover and contaminate the bearing. The simplified spacer tube design and lighter 7075 aluminum cups ensure quick installation and a 10% weight reduction over previous generations. All CeramicSpeed BB ALPHA models are handbuilt in Denmark and backed by a lifetime warranty.