DURA-ACE - HOLLOWTECH II - Road Crankset - 2x11-speed
The choice of the world's best climbers, sprinters, and time trialists, the DURA-ACE R9100 crank drops weigh while maximizing power transfer. The new design, and its iconic look, is adapted for race specific disc brake systems while still offering a wide range of gearing and crank arm length options.
Optimum power transfer
Best balance for lighter weight (-7g) and efficiency
New designed crank arm
Maintains high rigidity and reduces weight
HOLLOWGLIDE
4-arm construction crankset
Adapted for race specific disc brake system
Shorter length of rear center with O.L.D.135mm
Redesign the gear teeth profile to fit wider gear pitch
Rider tuned gearing options
Iconic design
PRODUCT SPECIFICATIONS
MODEL NO FC-R9100
SERIES DURA-ACE R9100 Series
Color Series color
Average weight 650 g (55-42T), 642 g (54-42T), 626 g (53-39T), 624 g (52-36T), 614 g (50-34T)
HOLLOWTECH II Technology ✔
Threaded BB shell width_70mm ✔
Chain line (mm) 43.5
Chain ring combination 55-42T, 54-42T, 53-39T, 52-36T, 50-34T
Compatible BB type_Outboard ✔
Compatible chain HG-EV 11-speed, HG-X11
Crank fixing bolt included ✔
Crank arm length (mm)_165.0 ✔
Crank arm length (mm)_167.5 ✔
Crank arm length (mm)_170.0 ✔
Crank arm length (mm)_172.5 ✔
Crank arm length (mm)_175.0 ✔
Crank arm length (mm)_177.5 ✔
Crank arm length (mm)_180.0 ✔
Gear arms 4
HOLLOWGLIDE ✔
HOLLOWTECH Technology ✔
Optional chain guard_Without chain / bash guard ✔
P.C.D. (mm) 110
Rear speeds 11
Recommended BB_Pressfit SM-BB92-41B
Recommended BB_Threaded (normal) BB-R9100
Technology HOLLOWTECH BB | HOLLOWTECH II
Threaded BB shell width_68mm ✔
Q-factor (mm) 146