The CeramicSpeed BB ALPHA T47/86 Shimano Road Bottom Bracket is a premium threaded T47/86 bottom bracket designed for Shimano 24 mm axle road cranksets. It is engineered to deliver maximum efficiency, ultra-low friction, and exceptional durability.
The BB ALPHA range is CeramicSpeed’s next-generation platform, offering improved sealing, simplified installation, and a lighter overall construction, while maintaining extremely low rolling resistance.
Key Features
Designed for T47/86 threaded frames (85–86 mm width)
Compatible with Shimano 24 mm axle cranksets
Ultra-low friction performance
Lifetime warranty
Up to 500% improved moisture protection
Lightweight, serviceable design
Simplified installation (no spacers required for Shimano systems)
Technology & Construction
Hardened stainless-steel bearing races for corrosion resistance
Grade-3 Silicon Nitride ceramic balls
Custom light-contact seals for optimal efficiency and protection
Stainless-steel reinforced seal backing
High-stiffness POM dust covers
7075 aluminum cups for reduced weight and increased strength
Optimized bearing positioning for improved contamination resistance
This bottom bracket is designed for riders using a Shimano 24 mm road crankset in a T47/86 threaded frame. The combination of advanced sealing and ceramic bearings provides extremely low friction, long service life, and excellent protection against moisture and contamination.
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