CeramicSpeed 6803 Bearing

The 6803 bearing has an inner diameter of 17mm, an outer diameter of 26mm, and a width of 5mm. You should verify these exact dimensions against your current headset bearings or your bicycle frame's technical specifications before purchasing.

These bearings are engineered for all cycling disciplines, including MTB, cross, road, TT, and track. The non-contact seals are designed to keep out trail debris and moisture while maintaining low friction.

CeramicSpeed's grade 3 Silicone Nitride balls are significantly harder, smoother, and lighter than standard steel. This results in reduced friction and improved power transfer, while the material's durability ensures a longer lifespan for the bearing.

The bearings come pre-lubricated with CeramicSpeed's low-viscosity All Round Grease. While they are built for durability, you should periodically inspect them for contamination and re-grease them according to standard headset maintenance intervals to ensure optimal performance.

The reinforced polyamide cage is used to securely hold the ceramic balls in place while minimizing friction. This material choice provides the necessary structural integrity to handle the loads of various cycling disciplines without adding unnecessary weight.