The Dura Ace FC-R9100 crankset by Shimano - cult look and performanceThe Shimano Dura Ace FC-R9100 11-speed crankset has the same 4-arm design with a uniform 110 mm bolt circle diameter as its predecessor, but it has once again lost weight. The hollow forged Hollowtech crankarm now weighs seven grams less, which increases performance once again. The hollow large chainring also benefits from the weight saving. Since the Dura Ace also keeps up with the times, the FC-R9100 can easily be used on racing bikes with disc brakes. What has remained, of course, is the unique Dura Ace aesthetics, which are certainly cult, as well as the Hollowtech II construction for the best stability values. The crankarms are still made of aluminium, carbon is also used for the chainrings. There are five different 2x gradations and six arm lengths available, so that every rider will find his suitable set-up according to Shimano's " Rider Tuned" philosophy.
Specifications:Application: Road, Triathlon
Compatibility: Shimano 2x11-speed
Chainring Mount: 110 mm pitch circle, 4-arm asymmetrical
Technical Information:Series: Dura Ace R9100
Crankarm Material: aluminium
Chainring Material: aluminium, carbon (CFRP) / aluminium
Axle Material: steel
Crankarm Length: 170.0 mm
Chainline: 43.5 mm
Q-Factor: 146 mm
Axle Diameter: 24 mm
Compatible BSA Shell Width: 68 mm
Recommended Bottom Bracket: BB-R9100 or SM-BB92-41B Pressfit Hollowtech II (not incl.)
Recommended Chain: HG-EV 11-speed, HG-X11 (e.g. CN-HG901-11)
Features:- optimum power transmission: optimum ratio of low weight to efficiency
- 4-arm crankset
- adapted to race-specific disc brake system
- optimized gear profile for wider pitch
- " Rider Tuned" graduation options
- legendary design
- anodised crankarms and chainrings
- anodised aluminium chainring bolts
A lightweight crankset not only reduces the bike's weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. Shimano's advanced forging technology has solved the problem through the Hollowtech crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very light weight.
The concept of the Hollowtech II technology was focused on the production of an optimised crankset that minimises the rider's effort for the ride. The high rigidity of the crankset ensures efficient power transmission when pedalling, while its low weight relieves the rider, especially over longer distances. The crankset was developed wanted to achieving an optimum ratio between stiffness, rotational efficiency, low weight and attractive appearance. Hollowtech technology enables extremely lightweight, hollow crankarms, manufactured using Shimano's exclusive forging technology, to achieve maximum stiffness. In addition, with the Hollowtech II crankset the right crank is firmly connected to the axle of the bottom bracket, achieving an optimum balance between maximum stiffness and minimum weight. The externally mounted bottom bracket offers better weight distribution and stability for more efficient power transmission.
Hollow outer chainring: The extremely stiff hollow structure reduces the weight while maintaining the same strength. Better power transmission and faster, more precise front shifts.
Manufacturer Part Numbers:
170.0 mm 52-36: I-FCR9100CX26
Contents:- 1 x Shimano Dura Ace FC-R9100 crankset
- 1 x Shimano crank bolt
- not incl. bottom bracket
- black/170.0 mm 52-36: 624 g (Without Bottom bracket)