A premium XD-15 ceramic hybrid replacement for 6901 hub bearings. Enduro designs XD-15 to get smoother with use rather than slower, and backs it with a Limited Lifetime Warranty against corrosion and wear.

Highlights

• XD-15 ceramic hybrid: cryogenically treated nitrogen steel races with Grade 5 silicon nitride balls
• 12 x 24 x 6mm radial bearing, ABEC-5, CN clearance
• Used mainly in hubs
• Dual-lip labyrinth (LLB) seals over a 90% fill of Kluber NBU52 grease
• Limited Lifetime Warranty against corrosion and wear

Why XD-15

Most ceramic hybrid bearings are at their fastest on day one and slow down as their steel races wear. Enduro's XD-15 races are a corrosion-resistant, cryogenically treated nitrogen steel, and Enduro says the hard ceramic balls polish them smoother as the bearing wears in. Deep-groove raceways make room for the largest possible balls, spreading load over a bigger contact area for performance and longevity.

Seals and grease

Dual-lip labyrinth (LLB) seals ride in a micro-groove to keep water and grit out, and hold in a 90% fill of Kluber NBU52 grease that resists washing out.

Compatibility & fit

Enduro lists this size as used mainly in hubs. Check your existing bearing is a 6901 (12 x 24 x 6mm) and use the internal clearance your hub maker specifies; this is the CN version. Fitting is a separate workshop service. Hub bearings need to go in square with the right press tools, and our workshop can handle hub and wheel bearing replacement for you.