The Shimano Dura Ace FC-R9200 crank performs two crucial tasks: It converts pedal power into propulsion and ensures extremely fast and precise shifting.
Not only do the lightweight crank arms, manufactured using Hollowtech II technology, contribute to this, but also the uniquely designed chainrings, which feature a Hollowglide construction and ensure fast as well as smooth shifting. The result is a responsive acceleration from any speed securing the 2x12-speed crankset in an absolute top position.
Technologies
Hollowtech II - The guiding principle of Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight and rotational efficiency. The goal was to produce a crank that minimises the effort required for the drive and enables more efficient power transmission.
An exclusive forging process allows the production of extremely light crank arms that nevertheless guarantee maximum stiffness. The fixed connection of the right arm to the axle of the bottom bracket and its external bearing also serves an optimum relationship between stiffness and low weight.
Specifications
| Material |
Crank arms, inner chainring: Aluminium (anodised)
Outer chainring: Aluminium (anodized), carbon fiber reinforced polymer (CFRP)
Axle: Steel (plated) |
| Crank Arm Length |
165mm/167.5mm/170mm / 172,5mm / 175mm
|
| Shifting System |
12-speed |
| Bottom Bracket Axle Profile |
24mm Hollow Shaft |
| Bottom Bracket Case Width |
68mm, 70mm |
| Road - bolt circle diameter |
110mm |
| Chainring Mount |
2-speed |
| Chain Line |
44.5mm |
| Q-factor |
148mm |
| Colour |
Black |
| Compatibility |
Front derailleur: FD-R9250, FD-R8150
Bottom bracket: BB-R9100 (thread type), SM-BB92-41B (Press Fit)
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100 |
| Weight |
approx. 714 grams (54-40 teeth) |
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