Ceramic Speed

BB ALPHA Road Bottom Bracket Bearing Kit - For BB90, Compatible with 24mm/Shimano Spindle

The CeramicSpeed BB ALPHA Road Bottom Bracket Bearing Kit for BB90 frames is engineered for riders who demand lasting performance and efficiency. Designed for 24mm spindle cranks, including Shimano, this bottom bracket delivers exceptional durability and smooth power transfer mile after mile.

Each bearing set is hand-built in Denmark and uses a combination of hardened stainless steel races and grade 3 Silicon Nitride ceramic balls to reduce friction and resist corrosion. The result is a bottom bracket that spins smoother, lasts longer, and provides up to five times better moisture protection than conventional designs.

Custom light-contact seals and precision-fit dust covers improve contamination resistance without compromising efficiency. The updated internal race design increases support for better handling of pre-load forces, ensuring consistent performance under demanding conditions.

• Compatible with BB90 frames and 24mm (Shimano) spindles
• Hand-built ceramic bearings for ultra-low friction and long service life
• Stainless steel races for corrosion resistance and durability
• Custom seals and flush-fitting POM dust covers enhance moisture and debris protection
• Redesigned internal race improves stiffness and load handling
• Backed by a lifetime warranty from CeramicSpeed