The evolution of perfection. The removal of traditional mechanical cables in favour of electrical wires, not only eliminates poor shifting caused by contaminants, corrosion & stretching, but provides effortless gear shifts. Key

Features: To ensure that the signal goes from the shifter to the derailleurs, the reliability of the electric cable has been proven by repeated field tests in various riding conditions, including extreme temperatures, rain, mud, & cobble stone roads. Dura-Ace Di 2 requires 2 cables: a handlebar cable set to connect the shifters to a battery indicator junction box or Flight Deck, & the other to connect the handlebar cable to the battery & derailleurs. The handlebar cable set is available in two types: one for use without a Flight Deck computer instead using a simple junction box to display battery life; the other is for use with Flight Deck. This handlebar cable set for non-Flight Deck use has specifically been developed to use with the TT spec ST-7971 & SW-7971 shifters & switches. Handlebar cables should not be cut to size or modified in any way. Reliable & secure water resistant connectors.

...

The Shimano Dura-Ace Di 2 (Dual Integrated Intelligence) features the most enhanced level of shifting technology. Put to the test in competition & used in victories by pro riders in every condition, including the 2012 Tour de France Team Sky. Di 2 has been made 11-speed for 2013. All new 9070 shifters features enhanced feedback & ergonomics, this provides simple access to the shift buttons at the top of the hoods. Clean wiring is possible with the single-wire E-tube connections, along with simple connections to satellite shifters on bar tops or in the drops.
- A.D. Key

Features: Dura-Ace Di 2 907011-Speed Road STI Levers
- Double. The most advanced level of shifting technology: at the touch of a switch Dura-Ace Di 2 is quick shifting, smooth, & effortless. The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminants, corrosion & stretching, & also provides effortless gear shifts. Simply pressing tactile buttons allows effortless & comfortable shifting even when your hands are cold. Buttons are located in a near identical place to the positions you'd assume for shifting using a mechanical Shimano STI. New design means that you can smoothly shift up or down by as many gears as you want simply by keeping the button depressed. Dura-Ace Di 2 is now compatible with Ultegra Di 2 cables, battery & junction box. Brake lever pivot is positioned to increase power & provide excellent ergonomics when riding on the hoods.
- Finely tunable reach adjusters for the levers enable a custom fit for any hand size. Levers are supplied without electrical cables, as these need to be ordered separately to suit your frame. Weight: 237g (per pair, manufacturer claimed). Compatible with the Flight Deck computer, measuring important data such as heart rate, altitude, cadence, gear position, battery indicator & allowing you to customise the shifting action of the derailleurs.




...

Shimano Dura-Ace 9071 are the next generation of Dual Control Levers. Put to the test in competition & used in victory by pro cyclists in every conditions, including road, across the pavé or mud. These 11-speed shifters have even been used by the 2012 Tour de France Team Sky. Triathletes & Time Trial cyclists won't need to choose a different shifter position, as Di 2 makes multiple shift controls possible. Dual Control levers can be used on the base bars & satellite controls on aero extensions to pick the ideal gear for all riding positions.
- A.D. Key

Features: Variety of control positions to keep shifts close to hand Fast, accurate & effortless shifts (single-button controls minimise movements for aerodynamic efficiency) Double & single button controls on aero bar shifters TT & Triathlon STI Levers – 11 Speed
- Double Most advanced level of shifting technology: at the touch of a switch Dura-Ace Di 2 is quick shifting, smooth, & effortless The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion & stretching, & also provides effortless gear shifts Simply pressing tactile buttons allows effortless & comfortable shifting even when your hands are cold Shift switches are located in an ergonomic easy to reach position on the side of the aero brake lever This switch positioning now gives the added advantage of being able to quickly shift while braking into corners & accelerating out previously not possible on a TT set up Brake levers are lightweight thanks to aero carbon fibre lever blades, carbon composite bracket body, & alloy fixings Compatible with the Flight Deck computer, measuring important data such as heart rate, altitude, cadence, gear position, battery indicator & allowing you to customise the shifting action of the derailleurs



...

Dura-Ace Di 2 (Dual Integrated Intelligence) moves to the next generation. Tested in competition & taken to victory by pro riders in all conditions, including the 2012 Tour de France Team Sky. No need for Triathletes & Time Trial riders to choose a shifter position
- with Di 2 multiple shift controls are possible. Use Dual Control levers on the base bars & satellite controls on aero extensions to choose the perfect gear in any riding position. Key

Features: The most advanced level of shifting technology: at the touch of a switch Dura-Ace Di 2 is quick shifting, smooth, & effortless. The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion & stretching, & also provides effortless gear shifts. Simply pressing tactile buttons allows effortless & comfortable shifting even when your hands are cold. These switches give the added option of being able to operate the gears from either the aero extension or the ST-9071 Dual Control brake levers. New 1 Button design means that you can optimise your aero position, with minimal movement required to shift. Compatible with the Flight Deck computer, measuring important data such as heart rate, altitude, cadence, gear position, battery indicator & allowing you to customise the shifting action of the derailleurs. Switches are supplied without electrical cables, as these need to be ordered separately to suit your frame. Weight: 60g (per pair, manufacturer claimed).


...

Dura-Ace Di 2 (Dual Integrated Intelligence) moves to the next generation. Tested in competition & taken to victory by pro riders in all conditions, including the 2012 Tour de France Team Sky. Di 2 provides the opportunity for shifting from previously inaccessible areas, & the Sprinter Switches allow for rapid shifting while in the drops. Find your perfect gear without having to change your riding position. Key

Features: The most advanced level of shifting technology: at the touch of a switch Dura-Ace Di 2 is quick shifting, smooth, & effortless. The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion & stretching, & also provides effortless gear shifts. Simply pressing tactile buttons allows effortless & comfortable shifting even when your hands are cold. Mount the Sprinter Switches anywhere on your handlebar to allow rear derailleur shifting in your preferred riding position. Weight: 10g (per pair, manufacturer claimed). Compatible with the Flight Deck computer, measuring important data such as heart rate, altitude, cadence, gear position, battery indicator & allowing you to customise the shifting action of the derailleurs.

...

Premium quality, precision engineered Dura-Ace track chainring, specifically designed to complement the Dura-Ace track chainset. Key

Features: Precision engineered nickel-plated aluminium Dura-Ace track chainring, for use with 1/2 x 3/32 inch chains. Durable & lightweight nickel-plated aluminium. Available in 44 to 54T sizes to fit 1/2" x 3/32" chain size. Dura-Ace track chainring fixing bolt pack also available. BCD: 144mm.

...

Premium quality precision engineered Dura-Ace track chainring specifically designed to complement the Dura-Ace track chainset. Key

Features: Precision engineered nickel-plated aluminium Dura-Ace track chainring for use with 1/2 x 3/32 inch chains. Durable & lightweight nickel-plated aluminium. Available in 44 to 54T sizes to fit 1/2 x 3/32 chain size. Dura-Ace track chainring fixing bolt pack also available. BCD: 144mm.

...

World renowned Dura-Ace precision. Hollow forged Dura-Ace crank set engineered for the light weight & rigidity that track racing demands. Key

Features: Engineered cranks designed for the rigours of the oval circuit. Hollow Tech hollow forged aluminium crank arms for light weight without compromising stiffness. Splined Octalink fitting for Dura-Ace bottom bracket to create a strong & rigid interface. Crank arms only, chainrings available separately. Weight: 505g (Manufacturer claimed). Available in 172.5mm crank arm lengths.

...

World renowned Dura-Ace precision. Hollow forged Dura-Ace crank set engineered for the light weight & rigidity that track racing demands. Key

Features: Engineered cranks designed for the rigours of the oval circuit. Hollow Tech hollow forged aluminium crank arms for light weight without compromising stiffness. Splined Octalink fitting for Dura-Ace bottom bracket to create a strong & rigid interface. Crank arms only chainrings available separately. Weight: 505g (Manufacturer claimed). Available in 172.5mm crank arm lengths.

...

Dura-Ace 7800
- one of cyclings icons. Key

Features: Replacement or upgrade chainrings Dura Ace 10-Speed


...