Enduro Bearings presents the XD-15 Ceramic-Hybrid bearings, featuring corrosion-resistant, cryogenically treated nitrogen steel races paired with Grade 3 Silicon Nitride ceramic balls. This advanced combination delivers superior performance and durability. The deep-groove raceways accommodate larger ceramic balls, enhancing contact area for improved efficiency and lifespan. Filled with 90% Kluber NBU52 grease, these bearings maintain smooth operation over time, resisting washout by adhering to the balls and continuously returning to the ball path where lubrication is critical.

Bike Radar hailed the Enduro XD-15 as the best bottom bracket bearing they have ever tested, a testament to its exceptional quality and performance. These bearings uniquely improve with use; as they wear in, the ceramic balls polish the races, resulting in even smoother operation over time. Unlike other ceramic-hybrid bearings that may lose efficiency, the XD-15 maintains its initial speed and power advantages and continues to enhance them. This confidence is backed by an unlimited lifetime bearing and race warranty, underscoring their durability and reliability.

This bearing is commonly used in lightweight hubs, pedals, derailleur pulleys, and certain full suspension systems, although the MAX-type bearing is better suited for pivot points. Enduro offers bearings in high-carbon chromium steel, 440C stainless steel, ceramic-hybrid, and XD-15 variants with either ceramic or stainless balls. Designed with the deepest possible groove races to fit the largest balls, these bearings also feature dual-lip seals that engage a micro-groove, forming a complete labyrinth for exceptional protection against contaminants.