Although the crank arms and spider arms are noticeably bigger, which increases stiffness, the overall weight 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 riders needs. Please note: Bottom bracket is NOT included
The super narrow lightweight 11-speed HG-EV symmetrical design chain has been designed for smooth shifts, and maximum durability.Whilst the outer plate design has been developed to reduce the chance of chain suck. The Sil-Tec surface treatment technology (PTFE plating) on inner and outer links and rollers that is smooth running and increases durability whilst the Hollow Pin design reduces weight. The inner plate has been developed for better contact with gears providing smoother shifting under high load, giving efficient pedalling, increased rigidity and near silent running.
Ready for action, these high-quality components are an ideal choice of upgrade for your Shimano XTR rear derailleur. Easy to install, these allow you to benefit from their light action on every ride.
Di2 uses a powerful long-life 7.4V Li-Ion battery, this charger will keep your Di2 system shifting and keep it in top condition.
All set for racing, this brilliant component features a durable alloy body construction which allows it to withstand all the rowdiness that comes with adrenaline-fuelled competitions. Shimano has gone a step further with this model by equipping it with a carbon fibre reinforced polymer lever for phenomenal actuation strength without any excess weight weighing down your handlebars. Adjustable Di2 Road Shifter Engineered for accuracy, this stunning version is kitted out with a tooled reach adjust mechanism. This allows you to easily tweak the distance between your handlebars and the lever to suit your riding style, hand-size or the terrain conditions. As a result, you'll benefit from a more skilful grip as you pull the lever as well as more precise shifting performance due to it feeling like a natural extension of your limb. Technologies: SEIS: A technological innovation of the computerized shifting system based on the DI2 concept with which is called, the SEIS (SHIMANO ELECTRONIC INTELLIGENT SYSTEM). The SEIS innovative shift technology is still based on the SHIMANO INDEX SYSTEM (SIS) that has proved its superior gear changing characteristics over the years. The big difference is that in this case, the shifting action is provided for by electronics instead of mechanics. This electronic shifting system has been extensively tested over past two years by several professional riders in all conditions possible, such as rain, mud, low temperatures, cobble stone roads and combinations of all of these at the same time. Shifting is executed by simply pressing the button. No power is needed to shift, which gives important advantages since it is easier now to always keep a tight grip on the handlebar and to keep your concentration on riding instead on shifting. The shift system allows accurate and effortless shifting in difficult circumstances for example when you have cold hands or when you are completely exhausted. Furthermore, the shifting performance will never be affected by contaminated or stretched cables since the shifting signal is transferred electronically. The operating buttons work similarly to mechanical DUAL CONTROL LEVER so you don’t need to re-program your mind for the SEIS. Reach Adjust: Brake lever is equipped with a reach adjust mechanism. The distance from handlebar grip to lever can be adjusted to suit any hand size, type of riding and individual rider preferences. E-Tube: The E-TUBE platform's “Plug & play” and D-FLY wireless connections make it easier than ever to check the system's status, and apply customized settings to DI2 and SHIMANO STEPS components with a PC, tablet or smart phone. Wirelessly customize functions like SHIMANO SYNCHRONIZED SHIFT over Bluetooth® while out on a ride. Automatically checks for firmware updates on each startup to ensure all components are running the latest version. PC, smartphone and tablet applications can help you quickly diagnose errors and simplify the repair process. Beautiful visualisation of your real-time SHIMANO STEPS riding data on your smartphone. Advanced all-weather design resists rusting, stretching, and freezing.
The Dura-Ace 7700 9sp Downtube Shifter Set is built for durability and reliability, fully compatible with mega9 precision 9 speed drivetrain, its coated aluminium finish and SIS compatability makes it perfect for performance users.
Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load.
Hard-wearing and accurately machined to run straight and true, ensuring an even tension in the chain.
Di2 electronic drivetrains use a powerful long-life 7.4V Li-Ion battery, this charger that will keep your Di2 system shifting and keep it in top condition and ready for shifting.
Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads. Using a hard wired battery system which is both light weight and accurate compared to current wireless technology (as a wireless system would require 4 batteries: one for the RD, one for the FD, and one for each shift lever). The use of a single small and discreet battery is light weight, efficient and creates a robust and reliable system. One charge can give between 1000 and 2000 kilometre range depending on conditions and front mech operation (as this is the main power drain).
These pads are 1mm thinner than standard pads to help give extra clearance on the wider profile of some carbon rims.
The shift paddles now feature a more defined "click" for confidence in shifting and to prevent mis-shifts, also the shift buttons have been extended in length meaning they are easier to reach from the drops and hoods. E-Tube compatibility means that the function of the shift paddles can be customised to suit the rider. The 9170 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.