CeramicSpeed Bearing

These bearings use silicone nitride balls, which are significantly harder and smoother than standard steel. This reduces friction and rolling resistance, leading to a more efficient ride and increased durability under load.

No, compatibility depends on your specific headset dimensions. These bearings have an inner diameter of 17mm, an outer diameter of 30mm, and a width of 7mm, so you must verify these measurements against your current headset specifications before purchasing.

Yes, the non-contact seals are designed to keep contaminants like dirt and moisture out without creating the drag associated with full-contact rubber seals. While they are efficient for various disciplines, they are best suited for riders who perform regular maintenance on their equipment.

Because they are optimized with low-viscosity grease, they require less frequent maintenance than standard bearings. However, we recommend periodic inspections to ensure the grease remains clean and the seals are properly seated, especially if you ride in wet or muddy conditions.

Yes, the 6903 bearing is versatile enough for road, mountain, and track applications. The hardened steel raceways and high-grade ceramic balls are engineered to handle the distinct stress profiles of these different cycling disciplines.