The choice of the world's best climbers, sprinters, and time trialists, the Dura-Ace R9100 chainringdrops weight while maximising power transfer.

The new design, and its iconic look, is adapted for race specific disc brake systems.

Features

Best balance for lighter weight (-7g) and efficiency

Maintains high rigidity and reduces weight

Shorter length of rear center with O.L.D.135mm

Optimum power transfer

Iconic design

Adapted for race specific disc brake system

Rider tuned gearing options

Specifications

Chain line (mm) 43.5 Compatible chain HG-EV 11-speed, HG-X11 Crank fixing bolt included No Gear arms 4 HollowGlide Yes HollowTech Technology Yes B.C.D. (mm) 110 Rear Speeds 11

Versions:

34 teeth (for use with 50 teeth)

Type: MS

36 teeth (for use with52 teeth)

Type: MT

39 teeth (for use with53 teeth)

Type: MW

42 teeth (for use with54 or 55 teeth)

Type: MX

50 teeth (for use with34 teeth)

Type: MS

52 teeth (for use with36 teeth)

Type: MT

53 teeth (for use with39 teeth)

Type: MW

54 teeth (for use with42 teeth)

Type: MX

55 teeth (for use with42 teeth)

Type: MX

Note: To guarantee best shifting performance, you may only combine chainrings of the same type, e.g. MS with MS