Qualcosa del tipo:
Shimano Bottom Bracket Cups Road Press Fit
Shimano SM-BB71-41B bottom bracket
• Complete 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
Ma non sono affatto sicuro che sia per asse 30 mm