Shimano Ultegra FC-R8100 2x12-Speed Crankset 52/36 Teeth 172.5mm

The Shimano Ultegra FC-R8100 crankset is designed for road riders with a Shimano 2x12-speed drivetrain. It has 52/36-tooth chainrings and 172.5 mm cranks.

• 52/36-tooth chainrings: gearing suited to riders seeking either speed or easier pedalling
• Compatible with Shimano 2x12-speed drivetrains, without adapters
• Anodised aluminium crank arms and a large chainring made partly from carbon
• 148 mm Q-factor: keeps the distance between the pedals compact
• Bottom bracket not included: SM-BBR60 or SM-BB72-41B is required for a 68 mm shell

Technical specifications

• Crank length: 172.5 mm
• Chainrings: 36-52 teeth
• Speed: 2x12
• Q-factor: 148 mm
• Chainline: 44.5 mm
• BCD: 110 mm, asymmetric 4-arm design
• Axle diameter: 24 mm
• Compatible BSA shell width: 68 mm
• Materials: anodised aluminium crank arms; aluminium/carbon large chainring (partly carbon); steel axle; aluminium chainring bolts
• Colour: Black

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.