CeramicSpeed BB Alpha Gravel BSA Threaded

The CeramicSpeed BB Alpha Gravel BSA Threaded is CeramicSpeed's dedicated gravel bottom bracket for BSA English threaded frames — the same ceramic bearing technology the brand is known for, built with sealing designed specifically for the wet, dirty conditions that standard road bottom brackets aren't equipped to handle. At the core are grade-3 Silicon Nitride ceramic balls hand-built into hardened stainless-steel races. These aren't pressed into generic cups — each unit is assembled to CeramicSpeed's exacting tolerances, which is why the brand backs every BB ALPHA with a lifetime warranty.

The gravel-specific designation matters. CeramicSpeed redesigned the dust covers through 28 iterations of development to nail the fitment, and the custom-engineered seals deliver 500% better moisture protection than conventional bottom brackets. That protection comes without trading away the ultra-low friction that makes ceramic bearings worth the investment in the first place. The updated cup design and simplified spacer tube also bring a 10% weight reduction over the previous BB ALPHA generation. Each unit ships with a sample of CeramicSpeed's UFO TECH Long Life Bearing Grease; the SRAM DUB version includes a DUB Spacer Kit.

Specs at a Glance

• Shell: BSA English Threaded, 68mm
• Bearings: Grade-3 Silicon Nitride ceramic balls, hardened stainless-steel races
• Moisture protection: 500% better than standard, via custom seals and precision dust covers
• Compatibility: Shimano (24mm spindle), SRAM DUB (28.99mm spindle), 30mm spindle
• Weight (Shimano): 81g | Weight (SRAM DUB): 87g
• Warranty: Lifetime
• In the box: BB ALPHA, UFO TECH Long Life Bearing Grease 5ml, decal (SRAM DUB adds DUB Spacer Kit)