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

The CeramicSpeed Ceramic Race Bottom Bracket BBright to 25mm solves a specific compatibility problem — running Campagnolo or Fulcrum UltraTorque cranks in a BBright Press Fit frame — and solves it with bearings that measurably outperform anything standard steel can offer. The 25mm designation refers to the crank spindle diameter, which is specific to UltraTorque systems.

BBright is an asymmetric press-fit standard with a 46mm inner diameter shell and a 79mm width — 11mm wider than BB30, with that extra material on the non-drive side to allow for a wider left chainstay and improved lateral rigidity. The aluminum cups and sleeves that house the bearings are CNC machined, with the bearings themselves pressed in at CeramicSpeed's facility in Denmark. Those bearings use Grade 3 Silicon Nitride balls — harder, smoother, and lighter than standard steel — installed into hardened steel races in clean-room conditions. CeramicSpeed's published testing puts their ceramic balls at 400% smoother and 128% harder than conventional steel balls, with bearing service life designed to run three to five times longer under normal conditions.

CeramicSpeed Ceramic Race Bottom Bracket Specs at a Glance

• Standard: BBright Press Fit
• Spindle diameter: 25mm (UltraTorque)
• Compatibility: Campagnolo and Fulcrum UltraTorque cranks
• Bearing type: Grade 3 Silicon Nitride ceramic in hardened steel races
• Shell width: 79mm asymmetric