Enduro's top-tier XD-15 ceramic-hybrid bearing in an extra-wide, double-row format for rear hubs. It fills the same space as two 6803 bearings and stiffens the hub axle against flex.

Highlights

• Double-row radial bearing, 17 x 26 x 10mm (ID x OD x width)
• XD-15 races: corrosion-proof, cryogenically treated nitrogen steel
• Grade 5 silicon nitride ceramic balls, maximum size in deep-groove raceways
• Dual-lip labyrinth (LLB) seals with a 90% fill of Kluber NBU52 grease
• Gets smoother with use as the ceramic balls polish the races
• Same space as two 6803 single-row bearings, with less axle flex
• ABEC-5, CN clearance

What makes XD-15 different

XD-15 is Enduro's own ceramic-hybrid recipe. The races are corrosion-proof, cryogenically treated nitrogen steel, paired with Grade 5 silicon nitride ceramic balls in a proprietary process. Deep-groove raceways leave room for the largest possible balls, for more contact area, performance and longevity. Unlike most bearings, XD-15 gets better with use: as it wears in, the super-hard ceramic balls make the races even smoother, so it becomes faster and smoother with time and use.

Where it is used

Enduro says this bearing is used primarily by Industry Nine in their rear hubs. The extra-wide, double-row design greatly reduces flex in the rear hub axle while precisely filling the same space as two 6803 single-row bearings.

Fitting and servicing

Routine servicing isn't needed to keep the XD-15 warranty, but Enduro recommends an annual service by a professional mechanic. Where possible, leave the bearing installed while servicing. If it has to come out, Enduro advises pressing it out gently with a linear press and the hub axle rather than using a blind hole puller. Our Marrickville workshop handles hub, bottom bracket and component bearing replacement; fitting is a separate workshop service and is not included in the price.

Compatibility & fit

• Size: 17 x 26 x 10mm (ID x OD x width)
• Main use: Industry Nine rear hubs (per Enduro)
• Fills the same space as two 6803 single-row bearings
• Match the clearance (C3 or CN) your hub or component maker specifies