Shimano bb92 road press fit bottom bracketthis road bike specific shimano bottom bracket is simple to install and gives you a smooth rotation on every ride. The cups are made from a durable reinforced polymer and are fully sealed to protect the bearings from the elements. It's compatible with all of shimano's hollowtech ii chainsets and other brands that use 24mm spindle diameters. This bottom bracket is ideal for replacing your worn out one or for upgrading from your bike's factory fitted model.featuresmaterial cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damagetype bb92 pressfitfor bottom bracket shell size compatible with 86.5x41mm pressfit typecup diameter 41mmcompatibility suits chainsets with 24mm axles eg. All shimano hollowtech ii chainsetssealed cups keep out dirt and watermaintenance freeeasy press fit installationset includes left and right hand cups, inner cover, and inner o ringsupgraded bearings compared to bb72 modelmanufacturer's reference code bb9241ba 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.