The Ultegra FC-R8100 Crankset by Shimano – For highly efficient power transfer
The Shimano FC-R8100 crankset converts the power you put into your Ultegra 2×12-speed road bike groupset into propulsion with high efficiency. Thanks to the proven Hollowtech II design, it meets all your requirements for stiffness and stability. You also benefit from the precise and fast shifting processes you are used to from Shimano drives. The crank arms are hollow-formed, as is the large chainring, which is partly made of carbon, resulting in significant weight savings. Apart from the axle, all essential parts were made of lightweight metal. FC-R8100 has an asymmetrical 4-arm bolt circle diameter of 110 mm. It produces a chainline of 44.5 mm and has a Q-factor of 148 mm.
Specifications:
- Application:
- Road
- Compatibility:
- Shimano 2×12-speed
- Chainring Mount:
- 110 mm pitch circle, 4-arm asymmetrical
Technical Information:
- Series:
- Ultegra R8100
- Crank Arm Material:
- Aluminium
- Chainring Material:
- Aluminium / Carbon, Aluminium
- Axle Material:
- steel
- Gradation:
- 34-50, 36-52
- Crank Arm Length:
- 160.0 mm, 165.0 mm, 170.0 mm, 172.5 mm, 175.0 mm
- Chainline:
- 44.5 mm
- Q-Factor:
- 148 mm
- Axle Diameter:
- 24 mm
- Compatible BSA Shell Width:
- 68 mm
- Recommended Bottom Bracket:
- SM-BBR60 or SM-BB72-41B Press Fit Hollowtech II (not included)
- Recommended Chain:
- CN-M8100
Compatibility:
2×12-speed:
- Shift/Brake Lever:
- ST-R8150, ST-R8170, ST-R8060, ST-R9250, ST-R9270, ST-R9160, ST-R9180, ST-R7170
- Front Derailleur:
- FD-R8150, FD-R9250, FD-R7150
- Bottom Bracket:
- BB-R9100, SM-BB9000, SM-BBR60, SM-BB6700, SM-BB5700, BB-RS500, SM-BB4600, SM-BB92-41B, SM-BB72-41B, SM-BB71-41B, BB-RS500-PB
- Chain:
- CN-M8100, CN-M9100, CN-M7100, CN-M6100
Features:
- perfect balance between stiffness, stability, weight and rotational efficiency
- optimised power transfer
- fast, high-precision shifting at the front
- hollow crank arms (Hollowtech)
- hollow-formed large chainring made of aluminium-carbon composite (Hollowglide)
- anodised crank arms and chainrings
- aluminium chainring bolts
Technology:
Hollowtech II
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an>
Manufacturer Numbers:
- 160.0 mm 34-50:
- I-FCR8100MX04
- 160.0 mm 36-52:
- I-FCR8100MX26
- 165.0 mm 34-50:
- I-FCR8100AX04
- 165.0 mm 36-52:
- I-FCR8100AX26
- 170.0 mm 34-50:
- I-FCR8100CX04
- 170.0 mm 36-52:
- I-FCR8100CX26
- 172.5 mm 34-50:
- I-FCR8100DX04
- 172.5 mm 36-52:
- I-FCR8100DX26
- 175.0 mm 34-50:
- I-FCR8100EX04
- 175.0 mm 36-52:
- I-FCR8100EX26
Contents:
- 1 x Shimano Ultegra FC-R8100 crankset (34-50 or 36-52 tooth)
- 1 x Shimano crank bolt
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