Enduro's top-of-the-line bottom bracket for Shimano 24mm cranks in a BSA threaded frame. XD-15 Corsa bearings thread straight in with no adaptors, and they get smoother the more you ride.

Highlights

• XD-15 Corsa 45° angular contact ceramic-hybrid bearings
• Cryogenically treated XD-15 nitrogen steel races, Grade 5 silicon nitride balls
• Precision-machined aluminium threaded cups in red
• For BSA threaded shells and Shimano 24mm spindle cranks
• Made at Enduro's production facility in California, USA
• Limited Lifetime Warranty against corrosion, wear and defects

XD-15 Corsa bearings

Enduro's top-of-the-line bottom bracket bearing, XD-15 Corsa, combines corrosion-proof, cryogenically treated XD-15 nitrogen steel races with Grade 5 silicon nitride ceramic balls in a 45° angular contact design. Enduro presses the bearings into precision-machined aluminium cups that thread directly into the BB shell. Enduro makes its XD-15 bottom brackets and bearings 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 BSA threaded bottom bracket shells and Shimano-type 24mm spindle cranksets. Enduro recommends its BBT-44x16-24 Pro Cup socket (44mm x 16-spline) or BBT-010 flat wrench to install it. Our workshop can install it for you as a separate service; fitting isn't included in the price.