Shimano - SM-BB71-41B Bottom Bracket

Complete Ultegra level press-fit bottom bracket assembly for Shimano HollowTech II road cranks. It features:

  • Cups 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
  • 41mm cup diameter
  • Easy press-fit installation

Compatible with 86.5mm shells