ULTEGRA's new FC-R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms.
An integral part of Shimano's new 12-speed road lineup, the FC-R8100 crank builds upon Shimano's legendary front shifting and transmission efficiency. With new refinements for seamless 12-speed shifting, the ULTEGRA crank is now offered in lengths from 160 to 175 mm, bringing performance and improved fit for smaller riders, triathletes, and riders with specific biomechanical requirements.
PRODUCT SPECIFICATIONS
MODEL NO
FC-R8100
SERIES
ULTEGRA R8100 Series
Color
Series color
Average weight
700 (50-34T) 711 (52-36T)
Rear speeds
12
Compatible chain
HG 12-speed
Chain line (mm)
44.5
P.C.D. (mm)
110
Spider/gear arms
4
Chainring combination
46-36T (NEW), 50-34T, 52-36T
Q-factor (mm)
148
Crank arm length (mm)|160
✔
Crank arm length (mm)|165
✔
Crank arm length (mm)|170
✔
Crank arm length (mm)|172.5
✔
Crank arm length (mm)|175
✔
Optional chain guard|Without chain/bash guard
✔
HOLLOWTECH II
✔
HOLLOWTECH crank arm
✔
HOLLOWGLIDE
✔
Compatible bottom bracket type|Outboard
✔
Recommended bottom bracket|Threaded (normal)
SM-BBR60
Recommended bottom bracket|Press-Fit
SM-BB72-41B
Threaded bottom bracket shell width (mm)|68
✔
Threaded bottom bracket shell width (mm)|70
✔
Crank fixing screw included
✔
Specifications
Size
50x34x160mm 12-Spd or
50x34x165mm 12-Spd or
50x34x170mm 12-Spd or
50x34x172.5mm 12-Spd or
50x34x175mm 12-Spd or
52x36x160mm 12-Spd or
52x36x165mm 12-Spd or
52x36x170mm 12-Spd or
52x36x172.5mm 12-Spd
Tags
Tags
Chainwheel Road SHIMANO Ultegra FC-R8100 w/o B.B. Parts Ind. Pack
