Shimano Ultegra 2x12V 175mm 34-50T Crankset

Shimano Ultegra R8100 Cranks - 2x12-speed - black
Ultegra R8100 – Leave Time Behind

When developing the Ultegra R8100 series, Shimano took a 100% performance-oriented, holistic approach, because with great speed comes great responsibility. Faster than ever, the 12-speed road bike groupset offers unmatched control and comfort anytime, anywhere, whether you're racing an all-terrain race, chasing a personal best, or racing. walk in company

Similar to the Dura Ace R9200, Hyperglide+ is not only incorporated into the Ultegra's components, but its Di2 parts are also based on wireless technology to further simplify operation and ensure smooth shifting.
Shimano Ultegra FC-R8100 Crankset

As the core element of the Ultegra R8100 series 12-speed drivetrain, the FC-R8100 crank is characterized by typical Shimano shift quality and drivetrain efficiency. Not only the Hollowglide hollow construction chainrings, but also the lightweight crank arms, made with Hollowtech II technology, contribute to optimized power transmission as well as faster and more precise shifting operations.

Taken together, this results in a perfect balance between stiffness, stability, low weight and rotational efficiency. The numerous crank lengths and chainrings with 50-34 or 52-36 teeth also offer variability and an optimal gear ratio for almost all riding situations.
Hollowtech II

The guiding principle behind Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight and rotational efficiency. The goal was to make a connecting rod that would minimize the effort required for the drive and allow more efficient power transmission.

An exclusive forging process allows the production of extremely light connecting rods that, however, guarantee maximum rigidity. The fixed connection of the right arm to the bottom bracket axis and its external bearing also serve for an optimal ratio between rigidity and low weight.

Material:
arms, inner plate: aluminum (anodized)
outer chainring: aluminum (anodized), carbon fiber reinforced plastic (CFRP)
shaft: steel (plated)

Compatibility:
front derailleur: FD-R9250, FD-R8150
Bottom Bracket: SM-BBR60 (Thread Type), SM-BB72-41B (Press Fit)
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100

Weight (170 mm, manufacturer data):
approx. 700 grams (50-34 teeth)

approx. 711 grams (52-36 teeth)