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