The Ultegra Hollow Tech II Crankset features an optimized lightweight design that doesn't sacrifice stiffness.
Wider gear pitch increases clearance between chain and leading teeth to provide compatibility with frames with O.L.D. 135mm and 410mm chain stay length
- 50-34T, 52-36T, 53-39T
- Wider gear pitch increases clearance between chain and leading teeth.
- Redesigned, stiffer crank arms inspired from Dura Ace R9100
- Hollow arms and large chainring
- Better compatibility with disc brake frames
- Compatible with shorter chainstays (410mm) on frames with 135mm or 142mm spacing.