All CeramicSpeed ​​bearings are handcrafted in Denmark. Super-smooth CeramicSpeed ​​Grade 3 silicon nitride balls are matched (within microns) to hardened steel races that feature an ultra-smooth polished raceway.

The balls are held in place by a reinforced polyamide cage. Each bearing is optimized with a low-viscosity CeramicSpeed ​​"Blue Grease" to minimize friction and increase bearing life. Contactless seals complete the bearings, keeping out dirt and moisture. CeramicSpeed ​​bearings can be used for any cycling discipline: road, TT, Tri, track, cross, and MTB. The benefits are extremely low friction, improved power transfer, and longer bearing life.

During the manufacturing process, we hand-check each bearing four times to ensure all parts are perfectly matched. CeramicSpeed ​​balls are 400% smoother, 128% harder, and 58% lighter than standard steel bearings typically used in the bicycle industry. Comparing CeramicSpeed ​​balls to other ceramic balls in the industry, you'll find that CeramicSpeed ​​balls are 15% harder, can withstand 99% more loads, and are 100% smoother.

Dimensions: 15 x 24 x 5 mm