• Complete Ultegra level press-fit bottom bracket assembly for Shimano HollowTech II road cranks. • Cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damage. • Set includes left and right hand cups, inner cover, and inner O-rings. • Sealed cups keep out dirt and water. • Maintenance free. • Compatible with 86.5 mm shells. • 41 mm cup diameter. • Easy press-fit installation.
