Enduro XD-15 Ceramic Sealed Cartridge Bearing

An Enduro exclusive, XD15 is the pinnacle in bicycle bearing technology. XD15 ceramic-hybrid bottom bracket and hub bearings combine silicon nitride grade 3 balls with an advanced, nitrogen-infused, aerospace steel bearing race that will never rust or corrode. The bearing race is so tough that should grit find its way through our double-lip labyrinth seals to the inside of the bearing, the surfaces will not pit. The grit actually polishes the bearing races smoother. To ensure ultimate longevity and performance, Enduro surrounds these super-smooth, super-fast bearings with our proprietary XD15 ‘speed’ grease. No one else in the bicycle industry offers XD15’s combination of speed and durability for hub, bottom bracket, and jockey wheel bearings. Guaranteed for life, Enduro XD15 are the last bearings you will ever buy until you N+1 your inventory.  XD15 Science XD15 starts as a very high grade of martensitic stainless steel which iscr re-melted in a precisely-controlled nitrogen filled ch