Products

Hollowtech II Bottom Bracket

Technical Documents
SI-1G30ESI-1G30E
Features
  • HOLLOWTECH 2: Optimum balance of lightweight and rigidity.
  • Outboard bearings provide additional stability
  • Minimal bearing interface for smoother rolling
  • Q-factor remains same as FC-6500/BB-6500.
Specifications
Model NumberSM-FC6600
SeriesULTEGRA
BB Shell Width68/70mm
Spindle LengthHOLLOWTECH II
Spindle Material
Adapter Materialaluminum
Average Weight