CeramicSpeed Ceramic Race Bottom Bracket - Threaded to 24mm (Shimano)

The CeramicSpeed Ceramic Race Bottom Bracket - Threaded to 24mm (Shimano) is built around one goal: less friction, more power to the road. Grade 3 Silicon Nitride ceramic balls are pressed into hardened steel races in dust-free clean rooms — a process designed to produce bearings that are measurably smoother, harder, and lighter than the steel bearings found in standard bottom brackets. The result is a bottom bracket that, according to independent friction testing, produces just 0.45 watts of frictional loss.

Ceramic bearings are the reason pro teams seek out CeramicSpeed — not for the marginal gains narrative, but because durability backs up the speed claims. CeramicSpeed's Grade 3 Silicon Nitride balls are designed to last three to five times longer than conventional steel bearings, meaning fewer replacements and more consistent performance over time. Available in English and Italian threading, with the 24mm spindle interface for Shimano cranksets, this bottom bracket fits directly into standard threaded frames with no adapters required.

CeramicSpeed Ceramic Race Bottom Bracket Specs at a Glance

• Interface: Threaded — English or Italian threading
• Spindle diameter: 24mm (Shimano-compatible)
• Bearing material: Grade 3 Silicon Nitride ceramic balls in hardened steel races
• Frictional loss: 0.45 watts (per independent friction testing)
• Variants: English/Black, Italian/Black, Italian/Red