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.Key Features: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. - Manufacturers part numbers: Shimano_BB7241B|ISMBB7241B
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