ULTEGRA CRANKSET 2X12s
FC-R8100

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.

Color
Ser­ies­ col­or

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.

BENEFIT

Optimal balance of stiffness, strength, weight and rotational performance

BENEFIT

HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting

BENEFIT

52-36, 50-34, and 46-36 chainring options. 160, 165, 170, 172.5, and 175 mm crank arm lengths.

Product Specification

PRODUCT SPECIFICATION

Model No

FC-R8100

Series

ULTEGRA

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, 50-34T, 52-36T

Q-factor (mm)

148

Crank arm length (mm)

160

165

170

172.5

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

Press-Fit

SM-BB72-41B

Threaded bottom bracket shell width (mm)

68

70

Crank fixing screw included

Average weight

702 (46-36T) 700 (50-34T) 711 (52-36T)

Color

Series color

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