The FC-09 crankset is a replacement for recalled Dura Ace 9000 series and early R9100 11 speed cranks
The HollowTech II 11-speed Dura Ace chainset offers an ideal balance of light weight and stiffness, making it the perfect choice for both enthusiast and competitive riders.
HollowGlide hollow outer chainring gives vast improvements in rigidity by virtually removing outer chainring flex and hugely improves shift performance, even under high load.
The chainring teeth have been developed to work in conjunction with 11-speed HG chains for increased contact to provide greater efficiency and improved power transfer.
Industry leading HollowTech II cold forged 4 arm hollow cranks have been evolved for maximum rigidity while reducing weight.
Wide gear pitch spacing increases clearance between chain and leading teeth to provide compatibility to frames with O.L.D. 135 / 142 mm.