Shimano introduces the all new 7900 series Dura-Ace. The new mechanical Dura-Ace group loses over 135g while maintaining it’s legendary durability and improving performance and ergonomics.
Since 1973, Shimano’s Dura-Ace components have been at the forefront of pro racing and pro-level technology. Dura-Ace has continued its legacy of being proven in the peloton as well as serving as a launch pad for new technologies. Index shifting (SIS), integrated brake and shift levers (STI), and hollow forged cranks (Hollowtech II) have set Shimano’s Dura-Ace as the benchmark in road bike componentry.
Please note that this groupset excludes HUBS and WHEELSET.
Features
Combined with a hollow outer chainring the crankset is 20% stiffer for optimal power transfer while still saving 15 grams.
Shifting stroke for the rear derailleur has been reduced by 20% for quicker shifts and a built in reach adjuster allows for fine tuning the fit for riders with smaller hands.
The chain uses hollow pins and weight drops by over 18 grams even with the addition of a quick connection / removal link.
With a new carbon fiber rear pulley cage, the rear derailleur loses another 16 grams while maintaining durability and improving performance.
The new Dura-Ace front derailleur cage eliminates the need to manually trim the front shifting. Additionally, the redesigned, more efficient wide linkage and optimized spring tension combine for reduced shifting effort.
While other brakes ditch sensible features like a spring tension adjuster or adjustable toe, the new Dura-Ace brakes still come equipped with those features and manage to drop nearly 30 grams per pair.
Cassette design is lighter as Shimano has developed a super lightweight and rigid aluminum cassette sprocket carrier.
