Keep an Italian-threaded frame rolling on Shimano 24mm cranks with Enduro's longest-lasting bearing. XD-15 ceramic-hybrid bearings won't rust like most ceramic hybrids, and they get smoother as they wear in.

Highlights

• XD-15 ceramic-hybrid 15° angular contact bearings
• Grade 5 silicon nitride balls in deep-groove raceways
• Pressed into precision-machined aluminium cups
• For Italian-threaded shells and Shimano 24mm cranks
• Made at Enduro's production facility in California, USA
• Stainless XD-15 nitrogen steel races resist corrosion and rust
• Limited Lifetime Warranty against corrosion, wear and defects

XD-15 bearings

XD-15 is Enduro's exclusive ceramic-hybrid bearing: stainless XD-15 nitrogen steel races that won't corrode or rust like most ceramic hybrids, with Grade 5 silicon nitride ceramic balls in deep-groove raceways that fit the largest possible balls. The 15° angular contact design gives full ball contact and works with the preload systems modern cranks use. Enduro presses the bearings into precision-machined aluminium cups that thread directly into the BB shell, guaranteeing accurate alignment in an Italian-threaded frame. Enduro makes its XD-15 bottom brackets at its own production facility in California, USA.

Gets smoother with use

Most ceramic-hybrid bearings roll best on the day they go in and slow down from there. Enduro says XD-15 bearings do the opposite: as they wear in, the balls make the races smoother still, so the bottom bracket rolls faster and smoother with time and use.

Compatibility & fit

For Italian-threaded bottom bracket shells and Shimano 24mm spindle cranksets. Depending on the cup spline, Enduro notes you may need one of its Pro Cup tools to install it. Our workshop can install it for you as a separate service; fitting isn't included in the price.