Shimano Ultegra SL HollowTech II chainset offers a fine balance of light weight and rigidity with incredible shifting performance. The Shimano HollowTech II allows the bottom bracket bearings to be spaced wider apart (outboard the frame) enabling the use of larger bearings and an increased axle diameter. There is also the benefit of easier installation , adjustment and maintenance. Other benefits include:
- Lightweight and rigid steel bottom bracket axle
- 30/39/52 SG-X aluminium anodized chainrings
- Aluminium chainring bolts
- Weight: 790 g (one of the lightest triple chainsets around)