The iconic Hollowtech II hollow forged crank has always been a benchmark for strength to weight performance characteristics and is the perfect platform for a crank intended to be used at the highest echelon of competition. Combined with a hollow outer chainring the crankset is 20% stiffer for optimal power transfer while still saving 15 grams. Other changes include redesigned chainring teeth for better contact and power transfer. Improved bottom bracket seals further reduce contamination and friction.

In addition to the standard Dura-Ace crankset, Shimano will also offer a Dura-Ace level compact crankset featuring 50-34T, model FC-7950.

The new STI Dual Control levers offer a refined ergonomic shape while reducing the weight by over 40 grams. With a Shimano first, the new STI levers offer unidirectional carbon fiber lever blades which reduce weight and offer shift cables hidden under the handlebar tape for a more sleek design. Using a revised internal mechanism along with PTFE lined casing, the shifting is still as light as ever.

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 shifters continue to have integrated controls for the all new FlightDeck computer (SC-7900), which has been updated to include heart rate, altitude, grade, cadence, gear position, and directly downloadable data via a wireless connection. The new SC-7900 is completely wireless.

With a new carbon fiber rear pulley cage, the rear derailleur loses another 16 grams while maintaining durability and improving performance. The new design is compatible with wider range cogsets (see all the new options below) and can accommodate a maximum 28 tooth cog. The available wider range creates even better compatibility with compact cranksets.

The front shifting system benefits from a revolutionary new design. The new Dura-Ace front derailleur cage combined with the new Dura-Ace chainring design eliminates the need to manually trim the front shifting. There's no need to trim since there's no chain/derailleur contact other than during a shift.

Additionally, the redesigned, more efficient wide linkage and optimized spring tension combine for reduced shifting effort.

Shifting has been even further improved by creating an even more rigid (and lighter) aluminum carrier unit along with re-engineered teeth profile.

Cassette design is lighter as Shimano has developed a super lightweight and rigid aluminum cassette sprocket carrier. The largest four cogs are titanium and weight is reduced by 10 grams.

The range of available combinations is extensive. Options will include: 11-21T, 11-23T, 11-25T, 11-27T, 11-28T, 12-23T, 12-25T, 12-27T.

Already the undisputed leader in braking performance...
Improved braking power, increased linear response, and reduced weight all make their way into the latest version of the Dura-Ace brakes.

A new brake pad compound doubles wet condition performance, while also improving dry power by 20%.

Enhanced linear response comes from a redesigned caliper arch while a lower profile cable stop creates better lines for the cables and reduces cable friction.

While other brakes ditch sensible features like a spring tension adjuster or adjustable toe, the new Dura-Ace brakes still come fully equipped and still manage to drop nearly 30 grams per pair.