The redesigned mechanical Dura-Ace drivetrain calmly holds its own in this brave new world of wires, batteries, and display screens.
It's fitting then, that the DURA-ACE FC-R9100 11-Speed Crankset also comes with the double chainrings that many roadriders despise to abandon just yet. Call upon your granny gear when needed with this lighter, stronger version of a top-end classic, and embrace a tried-and-true tradition of cables. Of course, in the even that you do decide to run electro-shifting, the crank's ring profile plays just as nicely with Di2 derailleurs.
1 - The crank and spider arms are noticeably bigger, increasing the stiffness and strength. However, the overall weight has dropped by 7g over the previous edition of Dura-Ace.
2 - The crankset has been modified to work with disc brake road bikes that generally have 135mm rear hub spacing and shorter chainstays without the need to increase Q-factor thanks to its wider chainring spacing.
3 - The Compact version offered here features a 50.34T chainring profile to offer an excellent rider tuned gear combination for varied conditions from flats to high mountains.
Weight: 650 g (55-42T), 642 g (54-42T), 626 g (53-39T), 624 g (52-36T), 614 g (50-34T)
Chain Line: 43.5mm
Chain Ring Combination: 55-42T, 54-42T, 53-39T, 52-36T, 50-34T
Gear Arms: 4
Crank Arm Length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5 mm, 180mm