Bottom brackets are rarely seen and often forgotten, yet they are the most highly stressed bearings on a bike. A great bottom bracket will last as long as your bike. (How often do you overhaul or replace the wheel bearings on your car?) SKF is a world-wide leader in bearings, and they applied their full know-how to their bottom brackets. For you, that means spending less time in the workshop and more time on the road. SKF bottom brackets come with a 10-year warranty that includes the bearings.