- 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