CeramicSpeed 61803V Full Ball

These bearings use silicon nitride ceramic balls, which are significantly harder, smoother, and lighter than standard steel. This combination reduces friction and wear, resulting in a smoother steering feel and a longer service life.

No. You must match the dimensions of your current bearing to the 61803V specifications: 17mm inner diameter, 26mm outer diameter, and 5mm width. Always verify your headset's specific requirements before purchasing.

The non-contact seal is designed to minimize friction, which helps with performance but offers slightly less protection against extreme mud or high-pressure water than a full-contact seal. It is best suited for riders who prioritize efficiency and perform regular, light maintenance.

These bearings come pre-optimized with CeramicSpeed's low-viscosity Blue Grease. If you need to service them, we recommend sticking with a similar low-viscosity grease to maintain the low-friction performance characteristics.

They are suitable for both. While they are engineered for maximum efficiency, the hardened steel races and reinforced polyamide cage provide the durability needed to handle the varied conditions of mountain biking, track, and road cycling.