The Shimano Dura Ace R9100 11 Speed Groupset includes: Shimano Dura Ace FC-9100 Chainset The HollowTech II 11-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite riders. Hollow outer chainring, giving vast improvements in rigidity and increased weight savings The hollow outer chainring has essentially removed outer chainring flex, hugely improving shift performance making it precise even under high load These industry leading HollowTech II 4 arm cold forged hollow crank arms have been evolved to increase rigidity, reduce weight, and improve strength The teeth have been developed to work only in conjunction with the 11-speed chains for improved contact providing more efficiency and improved power transfer There is a wide range of chainring ratios and crank arm lengths available enabling customisation for all riders and racing disciplines HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability Weight: 609 grams (50-34T) Shimano Dura Ace CS-R9100 Cassette - 11 Speed Super lightweight 11-speed HG-EV cassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changes. Hyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load Close ratio gearing allows a more efficient use of energy through finer cadence control Largest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and increase rigidity 5 largest sprockets are made from titanium to reduce weight without sacrificing strength Sprockets are extensively cut away and drilled to further reduce weight without reducing rigidity Nickel-plated finish offers hard wearing resistance to corrosion Alloy cassette lockring For Super Narrow 11-speed HG-EV chains Average weight 175 grams for 11-25 tooth Shimano Dura Ace FD-R9100 Front Derailleur Elite road racers demand reliable and precise shifting, 11-speed Dura-Ace R9100 delivers with its super-lightweight yet durable design. Lighter and intuitive shifting operation thanks to toggle link leverage construction Thanks to improvements in the cage design outer trim is no longer required allowing the rider to focus on racing Lightweight nickel-plated forged alloy chain cage reduces weight and increases rigidity whilst resisting abrasion from the chain Extra wide pivot link and optimised spring tension gives a rigid, flex free shift while being smooth and light action Forged aluminium construction reduces weight without sacrificing durability Hard-wearing finish expected of Dura-Ace Integrated cable tension adjustment Maximum capacity of 16 teeth, for use with outer rings 50-55T Weight: 69 g (braze-on) Shimano Dura Ace RD-R9100 Rear Derailleur - Short Cage Dura-Ace rear derailleur with lightweight carbon cage and wide link design gives quick accurate shifts, and unmatched drivetrain efficiency. Full carbon fibre inner and outer pulley plates enhance rigidity and significantly reduce weight Low profile Shadow derailleur design High tolerance cold forged aluminium link plates and body construction provide for extremely light weight, strength and durability High rigidity wide outer link plates the pulley body to increase pivot joint rigidity Sealed pulley bearings reduce friction and rotate silky smooth increasing efficiently Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting Pulleys are made of tough DuPont Zytel for longer life and less chain noise With a total capacity of 33 tooth, it is able to operate with wide gear ratios up to a 30 tooth cassette sprocket Hard wearing Dura-Ace finish and graphics for long lasting good looks 11-speed compatible Weight: 166 grams Shimano Dura Ace BR-R9100 Brake Caliper Top of the range SLR-EV dual symmetric pivot calliper brake with quick linear response, increased rigidity, and improved braking power. Enhanced brake arch proportions give a quicker linear response and increased power Better clearance with wider tyres, compatible with 28C tyre size Titanium centre pivot bolt for light weight Thrust bearings and coated bushings between arms for smooth linear feel and increased durability Brake pad compound offers excellent stopping power under wet and dry conditions, with improved durability Spring tension adjuster for precision setup Adjustable toe-in on the brake shoes for easy setting up Shimano Dura Ace CN-HG901 11 Speed Chain 116 Links Super narrow lightweight 11-speed HG-EV symmetrical design chain for smooth shifts and maximum durability Outer plate design has been developed to reduce the chance of chain suck Sil-Tec surface treatment technology on inner and outer links and rollers that is smooth running and increases durability Zinc-Alloy plated inner and outer links Hollow pin for added weight saving 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 5.62 mm chain width, optimised for 11-speed Super Narrow HG-EV drivetrains Average weight 243 grams Shimano Dura Ace ST-R9100 STI Shifters - Mechanical Shift and Brake Precision-engineered Dura-Ace STI lever for the ultimate in powerful braking and effortless 11-speed shifting, making it the global choice for road racing's elite riders. Dura-Ace R9100 STI are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt Shift cables routed under the bar tape using Polymer coated inner wires make for a smooth shift action, providing faster, lighter shifting Vivid Index shifting with short stroke to the release levers gives a quick and accurate shift Gear shift cables can either be routed round the front or rear of the handlebar to suit all rider preferences Ergonomic shift arc follows natural hand movement with inward shift stroke distance reduced for rapid and precise gear changes Small volume ergonomically designed smooth lever hoods for added comfort Brake lever pivots have been positioned to increase power and improve ergonomics when riding on the hoods Finely tuneable reach adjusters for the levers enable custom fitment for all hands Weight: 365 grams per set Bottom Bracket: Complete press-fit bottom bracket assembly for Shimano HollowTech II road cranks. Cups are made from fibre reinforced polymer material which reduces the risk of frame noise and damage. Set includes left and right hand cups, inner cover, and inner O-rings. Sealed cups keep out dirt and water. Maintenance free. Compatible with 86.5mm shells. 41mm cup diameter. Easy press-fit installation.

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