Bottom bracket Enduro Bearings Ceramic-Hybrid XD-15 BSA Shimano 24

BKC-0801 – a threaded-in BSA ceramic-hybrid, angular-contact bearing bottom bracket for 68 mm BSA framesets and Shimano cranksets with a 24 mm axle. The stated bottom bracket width is 68/73 mm.

Enduro Bearings’ exclusive XD-15 Pro bottom bracket features 15-degree angular-contact XD-15 bearings pressed into precision-machined aluminum cups that thread directly into the bottom bracket shell. It uses the same XD-15 steel as the XD-15 Corsa bearing. XD-15 Pro bearings are sealed, 15-degree angular-contact bearings in a standard-sized cartridge design. Deep-groove raceways allow the use of the largest possible Grade 5 silicon nitride ceramic balls to increase contact area, performance and longevity. XD-15 bottom brackets are manufactured at the Enduro Bearings facility in California, USA. The bearings combine corrosion-resistant, cryogenically treated nitrogen-steel races with Grade 5 silicon nitride ceramic balls.

This threaded-in solution allows Shimano-type cranks with a 24 mm axle to be used with a BSA-threaded bottom bracket shell.

Bike Radar described XD-15 as the best bottom bracket it had tested. The manufacturer states that the XD-15 ceramic-hybrid bearings carry a lifetime warranty against wear and corrosion. According to the manufacturer, the bearings break in with use, as the balls make the raceways smoother, so they can run more smoothly over time.

Enduro offers more than 50 bottom bracket types for different bottom bracket shell and crankset combinations and different price/performance levels. Threaded options are available for BSA, BSA 30, Italian and T47 shells. Options for press-fit bottom brackets include thread-together Torqtite bottom brackets and press-fit Delrin cups. Flanged double-row bearings are also available for 30 mm cranksets in BB86 shells.