CeramicSpeed Ceramic Race Bottom Bracket - EVO386 to 25mm (Campy UltraTorque)

The CeramicSpeed Ceramic Race Bottom Bracket EVO386 to 25mm solves a specific problem cleanly: it lets you run Campagnolo or Fulcrum UltraTorque cranks — with their 25mm spindle — in a BB386 EVO shell. Pressed aluminum cups house CeramicSpeed's Grade 3 Silicon Nitride ceramic balls, manufactured to a surface finish and roundness that measurably reduces friction compared to standard steel bearings. The result is a bottom bracket that spins freer and lasts longer than a conventional press-fit unit.

CeramicSpeed's Silicon Nitride balls are installed into hardened steel races in dust-free clean rooms, then verified before final assembly at CeramicSpeed's facility in Denmark — where the aluminum cup components are machined by Rotor of Spain before bearing installation. Bearing longevity is a genuine differentiator here: ceramic bearings designed to this specification are intended to last three to five times longer than standard steel equivalents, which matters when you're dealing with a press-fit interface that's not always simple to service.

CeramicSpeed Ceramic Race Bottom Bracket Specs at a Glance

• Bottom bracket standard: BB386 EVO (86.5mm wide, 46mm inner diameter)
• Spindle compatibility: 25mm (Campagnolo and Fulcrum UltraTorque)
• Bearing material: Grade 3 Silicon Nitride ceramic balls in hardened steel races
• Cup material: Aluminum
• Available in Black and Red