Upgrade your stock bottom bracket. Enduro bottom brackets are designed to spin more efficiently and for longer. Precision machined Delrin cups are lightweight and extremely durable, whilst ensuring perfect chainset alignment. Angular contact bearings provide maximum load distribution across all of the ball bearings unlike standard bearings which load only those at the bottom of the bearing. This load distribution ensures bearing life is increased drastically allowing for more time spent in the saddle than the workshop.Fits BB86 frames - 41mm diameter with a shell width from 86.5mmLightweight, durable Delrin cupsDurable 2437?Angular Contact BearingsIncludes BB30 adaptors to fit 24mm chainset86.37g