Complete press-fit bottom bracket assembly for Shimano HollowTech II MTB cranksCups are made from fibre reinforced polymer material which reduces the risk of frame noise and damageEasy press-fit installationSealed cups keep out dirt and water41mm cup diameter & sealed cupsMaintenance freeIncludes: left, right hand cups, inner cover & O-ringsRoad compatible: 86.5mm shellsRoad: Ultegra level assembly for Shimano Hollowtech II
