CeramicSpeed BB ALPHA Bottom Bracket — EVO386 Shimano Road

A bottom bracket built to outlast your frame. The CeramicSpeed BB ALPHA adapts a 24 mm Shimano road crank into the wide EVO386 (BB386 EVO) press-fit shell, delivering the lowest-friction, longest-lasting bottom bracket CeramicSpeed has ever made — so you can keep your Shimano crankset on a 86.5 mm-wide oversized shell. Why riders choose BB ALPHA Grade-3 Silicon Nitride ceramic balls in hardened stainless-steel races. Standard EVO386 adapters develop drag and creak after a single wet season, so you end up replacing them every year and losing watts in between. The hand-built ceramic bearing system runs ultra-smooth from day one and stays smooth for the life of the frame — you feel less resistance on every pedal stroke and stop budgeting for a yearly bottom bracket swap. Custom seals with 500% better moisture protection. The wide EVO386 shell traps moisture more than narrow standards — water gets past the seal and the bearing rusts from the inside. The redesigned BB ALPHA seal blocks moisture and contamination dramatically better than previous generations, so the bearing keeps spinning quiet and free through winter training, gravel detours, and every post-ride hose-down. Simplified spacer tube + lighter cups, 10% lighter overall. Old-style 386 adapters needed a bag of spacers and a service manual to install correctly into the 86.5 mm shell, and the cups added grams in the worst place on the bike. The new design installs in minutes with fewer parts to lose, and you save weight right at the bottom of the drivetrain where it matters for acceleration and climbing response. Custom dust covers refined through 28 design iterations. Cheap dust covers pop loose, rattle, or let dirt in — and 386-class shells are notorious for creaking when adapters are sloppy. The fitment-optimized covers stay seated and sealed under real road and race use, so the bearing stays clean and you don't hear any creaks or ticks coming from the BB shell. Lifetime warranty. CeramicSpeed backs every BB ALPHA for life. You install it once and you're done. What's in the box • BB ALPHA bottom bracket for EVO386 (BB386 EVO) press-fit frames, Shimano Road 24 mm • UFO TECH All Round Bearing Grease (5 ml) • CeramicSpeed decal Fitment BB shell: EVO386 / BB386 EVO (46 mm ID × 86.5 mm wide, press fit) Crank axle: 24 mm (Shimano road and compatible 24 mm cranks) Discipline: Road, Tri Net weight: 96 g EVO386 (also called BB386 EVO) is the wide oversized press-fit standard found on Wilier, Argon 18, BMC, and Ridley road frames, plus many tri/TT bikes. If your frame has a smooth 46 mm bore that's 86.5 mm wide, you're EVO386.