Shimano Ultegra FC-R8000 Chainrings

FEATURES

Lightweight crankarm design optimized for power-transfer efficiency

Minimal weight without sacrificing stiffness

HOLLOWTECH II

Rider-tuned gear performance through various gear combinations

Redesigned FC for greater frame compatibility

Wider gear pitch increases clearance between chain and leading teeth, providing compatibility with frames of O.L.D. 135 mm and 410 mm chainstay length

  

SPECIFICATION

Model No	FC-R8000
Series	ULTEGRA R8000 Series
Color	Series color
Average weight	690 (53-39T) 681 (52-36T) 674 (50-34T) 668 (46-36T)
Threaded bottom bracket shell width (mm)_70	✔
Chainring combination	50-34T 52-36T 53-39T 46-36T
Compatible bottom bracket type_Outboard	✔
Crank fixing screw included	✔
Crank arm length (mm)_165	✔
Crank arm length (mm)_170	✔
Crank arm length (mm)_172.5	✔
Crank arm length (mm)_175	✔
Spider/Gear arms	4
HOLLOWGLIDE	X - (46-36T)
HOLLOWTECH II	✔
HOLLOWTECH crank arm	✔
Optional chain guard_Without chain/bash guard	✔
Recommended bottom bracket_Press-fit	SM-BB72-41B
Recommended bottom bracket_Threaded (normal)	SM-BBR60
Threaded bottom bracket shell width (mm)_68	✔
Q-factor (mm)	146
Chain line (mm)	43.5
Compatible chain	HG-EV 11-speed, HG-X11
P.C.D. left / right (mm)	110
P.C.D. (mm)	110
Rear speeds	11