Enduro Bearings 6900 CXD LLB XD-15 Ceramic bearing, 10x22x6

XD-15 ceramic bearings use a different material than all other bearings on the market and are exclusively designed for enduro applications. XD-15 is a very special nitrogen-infused steel material that does not rust or corrode. Even when in contact with saltwater or an acidic beverage that spills, it will not break down or be compromised. Dirt or sand inside does not wear them out; instead, it polishes the raceways smoother. The production of this steel involves remelting a very high-quality stainless steel at the end of an electrode. This process takes place in a highly controlled remelting chamber with nitrogen gas being introduced, resulting in a homogeneous steel with the highest fatigue strength. A super strong, solid steel, perfectly paired with Grade 3 ceramic balls. XD-15 bearings improve over time. While other bearings are better on the day of purchase and then fail, XD-15 bearings get better with time. This means you save not only watts but also maintenance costs. The XD-15 is the pinnacle of bicycle bearing technology. Dimensions: 10x22x6 medium/low contact seal.