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
Possible to choose the best choice for ride
46-36T, 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
Compatible only with FD-R9100 and FD-R8000