The cassette is manufactured from a lightweight alloy and carbon fibre spider that houses 6 alloy sprockets and 5 titanium sprockets. The largest sprockets are manufactured from titanium to keep the weight low. The sprockets are also extensively cut away and drilled to further reduce weight without reducing rigidity. The very best and quickest shifts are optimised thanks to the Hyperglide EV sprockets that have a computer designed tooth configuration with contoured shift gates. All cassettes in the range will be compatible with the one rear derailleur so you can easily swap your cassettes out based on terrain.
The Shadow design of the Shimano Dura-Ace Di2 rear derailleur means it sits under the chainstay and cassette to give a slimmer profile, which not only improves aerodynamics but offers faster wheel changes and helps to prevent damage in a crash. It also offers faster and more precise shifting than ever before. Shimano's 9150 groupset brings its Syncro-Shift technology to the road too. Syncro-Shift technology enables the Di2 front derailleur to read the position of your Shimano Dura-Ace R9150 rear derailleur and will automatically operate the front shift to position the gears in the most efficient gear and best chain line, so you'll never have to worry about front shifting and correction shifts again.
E-Tube compatibility means that the function of the shift paddles can be customised to suit the rider. The shift paddles now feature a more defined "click" and have been extended in length for more confident and comfortable shifting. The 9150 shifters now include Synchro-shif technology that automatically moves the rear derailleur when the front ring is changed or moves the front chainring with the rear shifts to optimise chainline and drivetrain efficiency.
The clad steel / alloy / steel rotor construction of the Shimano ice tech rotor allows heat generated from braking to radiate quickly through the aluminium core achieving surface temperature drops of around 50 degrees C. When used with Ice Tech pads surface temperatures can drop from around 400 to 300 degrees C, this provides great improvements in performance all around. Freeza rotors allow the alloy core to extend out from the braking surface as fins to the centrelock mount adapter to provide added cooling. Ice Tech rotors achieve long pad life, less noise and less fade due to improved heat dispersion. The Shimano dura ace disc rotors are durable lightweight and rigid, using the proven centrelock system giving increased strength and security with an easy set-up. Plus, the precision cut and drilled braking surface improve pad clearing in muddy conditions while aiding cooling under high load. Finally, the large alloy spider is highly rigid and lightweight support for the rotor surface.
Ready to bring you efficient braking control without changing your hand or body position, this Shimano aero brake lever seamlessly combines with Shimano brake calipers for strong stopping power and fine speed control. This means you can confidently carry more speed into the corners for maintaining your momentum, which is an essential skill during races.
This Shimano Dura-Ace cassette is manufactured from a lightweight alloy and carbon fibre reinforced polymer spider that houses 6 alloy sprockets and 5 titanium sprockets. The largest sprockets are manufactured from titanium to keep the weight low. The sprockets are also extensively cut away and drilled to further reduce weight without reducing rigidity. The very best and quickest shifts are optimised on the Shimano Dura-Ace 11 speed cassette thanks to the Hyperglide (HG) EV sprockets that have a computer designed tooth configuration with contoured shift gates.
E-Tube compatibility means that the function of the shift paddles can be customised to suit the rider. The shift paddles now feature a more defined "click" and have been extended in length for more confident and comfortable shifting. The 9150 shifters now include Synchro-shift technology that automatically moves the rear derailleur when the front ring is changed or moves the front chainring with the rear shifts to optimise chainline and drivetrain efficiency.
Although the crank arms and spider arms are noticeably bigger, which increases stiffness, the overall weight of the Shimano Dura Ace R9100 chainset has dropped by 7g over the previous edition of Dura-Ace. Shimano has adapted the crankset to work with disc brake road bikes that generally have 135mm rear hub spacing and shorter chainstays without the need to increase Q-factor thanks to its wider chainring spacing. The double version offered here comes in numerous gear combinations to best suit each individual rider's needs. Please note: Bottom bracket is not included.
Lightweight Dura-Ace quality chainring.
The all-new 2013 Dura-Ace group is the result of 40 years of development and innovation, tested to the limit at the highest level of competition in road racing, time trials and cyclo-cross. Dura-Ace delivers concentration, control and confidence with slick, fast, accurate performance that you can depend upon without distraction. Dura-Ace now has an 11-speed cassette with numerous gearing options to cover all situations. Leading edge design, materials and construction reduce weight, improve stiffness and enhance control.
Simple to install, these Shimano Dura-Ace brake pads bring you impressive braking power, even in the wettest rising conditions. This means you can push your road bike to its limit around bends and down steep descents with confidence.
Supreme Aerodynamic Performance Advantage The 40mm rim depth and profile provide a supreme aerodynamic advantage in terms of speed and stability while being exceptionally stiff. The wide rim internals provides an optimised tyre profile when using wider tyres, specifically 28mm tyres. This increased rim width provides the perfect tyre profile/shape to create greater contact patch with the ground, increasing speed, grip and adding an aerodynamic benefit. Stiffness, Stability and Highest Levels of Performance Equipped with straight-pull, stainless steel bladed spokes, laced with Shimano cold-forged aluminium hum front and rear. This wheel is designed to roll on 12mm thru-axles to increase stiffness, stability and safety to even higher levels of performance; this wheelset is perfect for Racing, Endurance days in the saddle, training or exploring new routes in the hills.