True competitors are always looking for a performance advantage — a relentless pursuit of equipment that is lighter, stiffer, stronger and more durable. To create the best drivetrain possible, we re-examined and re-engineered our crankset design. Our all-new XX1 Eagle™ CARBON TUNED™ crankset is our lightest, stiffest and strongest to date. DUB™ technology enhances this by simplifying the relationship of the spindle to the bottom bracket, and redefining the measure of durability. DUB-powered cranksets mean simplicity, compatibility and durability.Eagle™ represents our newest 1x drivetrain technologies Eagle™ is a lighter, tougher, quieter, more durable and more precise drivetrains Eagle™ features all-new 1x components, engineered for even greater durability and performance Eagle™ has a significant weight advantage over other drivetrains Eagle™ technology allows an expanded, optimum, 500-percent gear range — a 20-percent increase over our other 1xKey Features:DUB™ technology delivers the lightest, stiffest, strongest crankset available ,All-new SRAM CARBON TUNED™ crank technology provides extreme stiffness and light weight ,All-new chainring technology is designed specifically for Eagle™ chains and drivetrains ,The X-SYNC 2™ chainring provides significantly quieter performance, with better mud clearing and extraordinary durability,Speeds: 11/12,BB Compatibility: DUB BSA MTB 100, DUB PF MTB 121, DUB BSA73, DUB PF89.5, DUB PF92, DUB PF30 MTB73, DUB BB30 MTB73,Chainring Size: 30, 34,Crank arm length: 170mm, 175mm,Chain line: 49.0mm, 52.0mm, 66.5mm, 76.5mm,BB Spindle Interface: DUB,Chainring material: Aluminium,Guard: No Guard,Bolt Circle Diameter (BCD): Direct Mount (DM),Crank arm material: Carbon,Colour (Crank arm): Black, Gold.
Key Features:Speeds: 11/12,BB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP,Chainring Size: 34,Crank arm length: 170mm, 175mm,Chainline: 49.0mm,BB Spindle Interface: DUB,Chainring Material: Aluminum,Guard: No Guard,Bolt Circle Diameter (BCD): Direct Mount (DM),Crank arm material: Carbon,Color (Crank arm): Grey.
An everyday commuting or leisure bike with 24 speed Shimano gears and EZ fire shifters. No corners cut, the specification includes a Shimano chainset, Shimano hubs and hydraulic disc brakes.
This fantastic groupset comes equipped with Centaur Ergopower controls for comfortable pulling and shifting, ultra-efficient derailleurs, a Centaur chainset with two chainrings, a cassette, chain and forged aluminium rim brakes, plus a BB86 bottom bracket. A top-quality kit that ensures reliable and hard-working performance from the starting line to the podium, the Centaur 11 Speed Groupset has everything to push you on to glory. Centaur Power Shift Ergopower Controls Redesigned right Power-Shift mechanism Multiple upshifting (up to 3 gears) Ergonomic downshift lever position New lip introduced on the Ergopower body Geometry specifically designed to optimise command/ handlebar interface Centaur Rear Derailleur Redesigned rear derailleur trajectory angle (45 degrees) One rear derailleur available for every setup combination Pulley wheels with bushings Upper pulley wheel with longer teeth Medium cage Centaur Front Derailleur Super record influenced design One-piece steel cage Shaped outer semi-cag Braze-On Centaur Ultra Torque Chainset Four arm design 50/34T chainring combination Optimised inner surface on both cranks Two chainrings Centaur Cassette Specific cassette developed with the “Campagnolo 11” layout Specific finishing 12-32T Campagnolo Potenza Chain Wider link design Ultra-Link chain connecting system 114 links Centaur Brakes Forged aluminium solid brake arms Adjustable brake pads Special brake pad compound Type: Dual pivot rim brakes Direct Mount Brake Universal brake shoe Aerodynamic design Fast assembly Fast adjustments Ultra Torque BB86 Bottom Bracket Cups Ultra-Torque bottom bracket cups for BB86 BB shells and Campagnolo's Ultra-Torque chainsets. Bearings are not included. Type: BB86 Size: 86.5mm x 41mm Bearings not included
The SRAM red eTap WiFli rear derailleur benefits from the same quality construction of the mechanical SRAM Red version, featuring ceramic pulley bearings, a carbon cage and an anodised alloy body. It utilises SRAM’s own wireless technology that provides a secure connection and the removable battery (sold separately) has a 1000km range. So, if you forget to top up your battery and it runs low miles from home, simply swap it over with the front derailleur's battery to get back on the road with a full cassette range. Please Note: Battery not included Technologies: AIREA™: Utilising 128-bit encryption, eTap® shift signals are transmitted and received in accordance with SRAM’s proprietary wireless protocol known as AIREA. Each time an eTap groupset is paired, a new encryption code is generated and assigned to the components in this group to ensure complete shifting security. eTap: All of the underlying tech in SRAM's updated RED eTap groupset, such as wireless shifting, advanced battery power management, and mechatronics technologies, are meant to serve one ultimate purpose: to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. Right lever makes it harder, left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive. X-Sync: SRAM X-Sync 1x chainrings provide the highest level of performance and durability. The SRAM X-Sync tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation. Orbit: Orbit technology is an innovative new form of derailleur motion control. It utilises silicon fluid as part of an elegant and ultra-lightweight damper system. Compared to a standard friction clutch system, Orbit technology places no additional resistance on the rear derailleur’s spring when under slow or light movement. This means easier shifting and rear wheel removal. And while riding, the fluid damper reduces chain bounce. It’s rock-solid reliability for both 1x and 2x systems. WIFLI: WiFLi = Wider - Faster – Lighter. SRAM's WiFLi Technology is based on the compact 2 x 10 or 11 - two front chainrings and 10 or 11 gears in the rear - design inherent in SRAM RED 22, Force 22, Rival 22 and Apex, which delivers a wider range of gears, up to 11-32, than your standard triple, faster shifts through two chainrings and every gear on the rear cassette, and with significant weight savings. WiFLi cassettes are also available for Force CX1.
SRAM RED eTap 11 Speed WiFli Rear DerailleurEnjoy reliable wireless shifting performance with the 11 Speed WiFli Rear Derailleur from SRAM. Designed with a bigger cassette size than their previous model, this component is the ideal choice for cyclocross (CX) or gravel riding. SRAM’s own wireless technology provides a secure connection and the removable battery has a 1000km range. So, if you forget to top up your battery and it runs low miles from home, simply swap it over with the front derailleur's battery to get back on the road with a full cassette range. This rear mech also benefits from the same quality construction of the mechanical SRAM Red version, featuring ceramic pulley bearings, a carbon cage, and an anodised alloy body.Features:Wireless connection via AIREA network for a fast and clean installationSimple clip-on, clip off removable battery (swappable with front derailleur-battery not included)Cage Length/Type: ShortCage Material: CarbonSpeed: 11 SpeedRear Derailleur: SRAM Red eTapPulley Bearings Material: CeramicMaximum Tooth: 33Compatibility: SRAM 11-speed compatible, 32 teeth maximum capacity, designed to work with SRAM PowerGlide and PowerdomeX cassettes, only compatible with SRAM RED eTap shift/brake controlsPart Number: RD-RED-E-A2Please Note: Battery not includedTechnologies:AIREA: Utilising 128-bit encryption, eTap® shift signals are transmitted and received in accordance with SRAM’s proprietary wireless protocol known as AIREA. Each time an eTap groupset is paired, a new encryption code is generated and assigned to the components in this group to ensure complete shifting security.eTap: All of the underlying technology in our new SRAM RED eTap groupsets, such as wireless shifting, advanced battery power management, and mechatronics technologies, are meant to serve one ultimate purpose: to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. The right lever makes it harder, the left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive.X-Sync: SRAM X-Sync 1x chainrings provide the highest level of performance and durability. The SRAM X-Sync tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation.Orbit: Orbit technology is an innovative new form of derailleur motion control. It utilizes silicon fluid as part of an elegant and ultra-lightweight damper system. Compared to a standard friction clutch system, Orbit technology places no additional resistance on the rear derailleur’s spring when under slow or light movement. This means easier shifting and rear wheel removal. And while riding, the fluid damper reduces chain bounce. It’s rock-solid reliability for both 1x and 2x systems.WIFLI: WiFLi = Wider - Faster – Lighter. SRAM's WiFLi technology is based on the compact 2 x 10 or 11 - two front chainrings and 10 or 11 gears in the rear - design inherent in SRAM RED 22, Force 22, Rival 22 and Apex, which delivers a wider range of gears, up to 11-32, than your standard triple, faster shifts through two chainrings and every gear on the rear cassette, and with significant weight savings. WiFLi cassettes are also available for Force CX1.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM GX Eagle AXS 12 Speed MTB Upgrade KitThis upgrade kit is ideal for riders who already own Eagle products and don't need to buy an entirely new groupset, as it's compatible with any of SRAM's Eagle ecosystem cassettes and crank arms. It is a perfect entry point into wireless drivetrain simplicity, no matter if you are looking to upgrade your ride or looking for great value replacement parts. Look no further than the GX Eagle AXS Upgrade Kit.GX Eagle AXS 12 Speed Rear DerailleurRiders want a derailleur that shifts on command, whether under climbing load or sprinting to the stage finish. The GX Eagle AXS derailleur gets it done with everything you have come to expect from SRAM AXS connect components. The GX Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. Engineered with a variety of rider preferences in mind, it is compatible with SRAM's updated expanded range 10-52t cassette as well as its 10-50t cassette. Showcasing its lineage from the proven GX Eagle mechanical line, the GX Eagle AXS derailleur is there for one thing - to do the job.Features: Cage Material: Steel Pulley Bearings Material: Steel Use: MTB Speed: 12 speed Max Tooth: 52 Battery Included: YesGX Eagle AXS 12 Speed Shifter/Controller with ClampSimplicity and performance made for all-day adventures. The pure shifting performance of Eagle AXS is now available with GX. Shift under load, over the roughest terrain, uphill, without changing your grip on the bar. GX Eagle AXS changes your level of control on the bike when you're under pressure and pushing hard. More than that, it changes your relationship with the bike. No cable, housing or wires to manage opened up design and engineering possibilities with the GX Eagle AXS controller. Featuring the proven ergonomic touchpoints that make shifting effortless, they are customisable to your preferences, allowing you to choose which button does what through the AXS App.Features: Use: MTB Default Function: AXS - Rear Derailleur Orientation: Right hand, 2-button controller Control Points: Double Clamp: Discrete clamp Speed: 12 speed Compatible with ANT+ Devices: Yes Lever Adjust: No Multi-Position: Yes Battery Size: CR2032 Compatible with MatchMaker X Customise in-board and outboard shift options System is completely water and dustproof to IP69K AXS enabled componentry software that makes it possible to both program and personalise new SRAM and RockShox componentsSRAM Charger, Cord and Chain Gap ToolThis upgrade kit is finished off with an official SRAM charger and cord, so riders can enjoy simple charging for their batteries. As a battery is included with the rear derailleur in this kit, it can be charged without the use of any tools thanks to the charger's tool-free battery latch. Coming complete with a Chain Gap Tool, it ensures that riders can precisely set up and adjust the rear derailleur with ease.Groupset Features: Includes: Rear Derailleur with Battery Controller with Clamp Charger/Cord Chain Gap Tool Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Dura-Ace R9270 Di2 12 Speed Disc BrakeThe Dura-Ace R9270 Di2 12 Speed Disc Brake from Shimano features Servo Wave technology and is compatible with Shimano Di2 electronic drivetrain systems. Plus, it guarantees powerful all-weather stopping power and flex-free lightweight braking performance thanks to its carbon fibre brake lever and titanium hardware.All-new lever ergonomics on the Dura-Ace ST-R9270 dual control levers bring new levels of comfort and control to road cycling. With the fastest wireless shifting available and even more precise brake modulation, Dura-Ace redefines performance. Now featuring Servo Wave Action brake technology, the new Dura-Ace ST-R9270 brake lever delivers modulation and control like never before. Wireless shifting keeps your bike looking clean while offering the fastest, most precise gear changes available. All of this resides in a Dual Control Lever to employs the most advanced materials to offer lightweight and refined ergonomics that provide comfort and control for the most demanding conditions. Servo Wave Precise Braking ControlWhen you pull a Servo Wave brake lever, initial pad travel is fast, so little lever movement is needed to bring the pads into contact with the rotor. The power multiplication factor then increases rapidly at the pad-to-rim contact so more of the lever stroke is used to apply greater braking power with improved control. Shimano DCL Dual Control LeverDCL stands for Dual Control Lever. It has brake and shifting functions in the system and enables easy operation. Ergonomic innovation is as critical to higher standard performance as the added gearing. The shift internals borrows the robustness from Shimano's MTB technology and is so smooth and effortless that one finger shifts front and rear are possible. Indeed, shifting is the ultimate act of Shimano Total Integration and simply has to be experienced to be understood. Shimano E-TubeE-Tube is Shimano's “service” that uses websites or apps to maximize the enjoyment of riding a bicycle by connecting the riders, the bicycles and Shimano. Shimano's genuine application E-Tube Project for Mobile allows you to customize your bike, update firmware, and maintain it by connecting it wirelessly to your bike. You can also get more detailed bike maintenance by connecting to your bike by wire with E-Tube Project via the Windows V4 application. Features: Quick and intuitive shifting Series: Dura-Ace R9200 Series Drivetrain: Shimano Di2 Electronic Speeds: 12-Speed Carbon fibre brake lever and titanium hardware SERVO WAVE technology optimizes brake control Raised hood peak improves ergonomics, while a longer hood body increases hand support Compatible with satellite shifters 1.5 to 2 years of battery life with easy-to-change CR1632 shifter batteriesA 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Dura-Ace R9200 12 Speed ChainsetThe Dura-Ace R9200 12 Speed Chainset from Shimano provides the optimum balance of strength and rigidity at a low weight. Shimano's Hollowtech II and Hollowglide technologies provide outstanding power transfer and smooth gear shifts while it's engineered to excel specifically with the Shimano 12-Speed road groupset systems.The Dura-Ace FC-R9200 chainset is the driving force at the heart of the bicycle. This chainset ensures that no portion of your pedal stroke is wasted. With hollow arms and chainrings, weight is kept to a minimum but stiffness and shifting precision is maximized.Hollowtech II Technology for World-Class Strength at a Low WeightThe Dura-Ace FC-R9200 crank performs two vital functions: transferring your pedalling effort into the drivetrain and ensuring the fastest, most precise front shifting available. With Hollowtech II crank arms to ensure lightweight and Shimano's class-leading chainring designs, the FC-R9200 won't let you down. And the FC-R9200 12 Speed Chainset is offered in even shorter crank arm lengths to ensure there are options to fit any rider.Hollowglide Chainring TechnologyHollow technology on the outer chainring. The Hollowglide construction ensures high rigidity while its hollow structure cuts down on weight yet maintains strength. This provides better power transfer and quicker and more precise front shifting performance.Hollowtech II Forged Crank ArmsA lightweight crankset not only reduces the bike's weight but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity.Shimano's advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high-quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight.The Best Balance of Stiffness, Strength and WeightThe concept of Hollowtech II technology is focused on producing a superior crankset that will maximize a rider's power transfer. The rigidity of the crankset ensures pedalling efficiency while its low weight, a key element of the crankset, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank.The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedalling stability, allowing for more efficient power transfer.The Shimano Dura-Ace R9200 12 Speed Chainset has been developed by pursuing the optimum balance of stiffness and rotating performance in a lightweight and beautiful crankset design.Features: Series: Dura-Ace R9200 Series Optimal balance of stiffness, strength, weight and rotational performance Hollowglide structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting New 54-40T option to realize the most efficient drivetrain Hollowtech II crank arms for strength at a low weight Recommended Bottom Bracket: Press-Fit: SM-BB92-41B; Threaded: BB-R9100 Q-Factor: 148mm Drivetrain Rear Speeds: 12-Speed Chainline: 44.5mm Weight: 714g (54-40T); 692g (52-36T); 685g (50-34T)A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Dura-Ace R9200 12 Speed ChainsetThe Dura-Ace R9200 12 Speed Chainset from Shimano provides the optimum balance of strength and rigidity at a low weight. Shimano's Hollowtech II and Hollowglide technologies provide outstanding power transfer and smooth gear shifts while it's engineered to excel specifically with the Shimano 12-Speed road groupset systems.The Dura-Ace FC-R9200 chainset is the driving force at the heart of the bicycle. This chainset ensures that no portion of your pedal stroke is wasted. With hollow arms and chainrings, weight is kept to a minimum but stiffness and shifting precision is maximized.Hollowtech II Technology for World-Class Strength at a Low WeightThe Dura-Ace FC-R9200 crank performs two vital functions: transferring your pedalling effort into the drivetrain and ensuring the fastest, most precise front shifting available. With Hollowtech II crank arms to ensure lightweight and Shimano's class-leading chainring designs, the FC-R9200 won't let you down. And the FC-R9200 12 Speed Chainset is offered in even shorter crank arm lengths to ensure there are options to fit any rider.Hollowglide Chainring TechnologyHollow technology on the outer chainring. The Hollowglide construction ensures high rigidity while its hollow structure cuts down on weight yet maintains strength. This provides better power transfer and quicker and more precise front shifting performance.Hollowtech II Forged Crank ArmsA lightweight crankset not only reduces the bike's weight but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity.Shimano's advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high-quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight.The Best Balance of Stiffness, Strength and WeightThe concept of Hollowtech II technology is focused on producing a superior crankset that will maximize a rider's power transfer. The rigidity of the crankset ensures pedalling efficiency while its low weight, a key element of the crankset, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank.The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedalling stability, allowing for more efficient power transfer.The Shimano Dura-Ace R9200 12 Speed Chainset has been developed by pursuing the optimum balance of stiffness and rotating performance in a lightweight and beautiful crankset design.Features: Series: Dura-Ace R9200 Series Optimal balance of stiffness, strength, weight and rotational performance Hollowglide structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting New 54-40T option to realize the most efficient drivetrain Hollowtech II crank arms for strength at a low weight Recommended Bottom Bracket: Press-Fit: SM-BB92-41B; Threaded: BB-R9100 Q-Factor: 148mm Drivetrain Rear Speeds: 12-Speed Chainline: 44.5mm Weight: 714g (54-40T); 692g (52-36T); 685g (50-34T)A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Dura-Ace R9200 12 Speed ChainsetThe Dura-Ace R9200 12 Speed Chainset from Shimano provides the optimum balance of strength and rigidity at a low weight. Shimano's Hollowtech II and Hollowglide technologies provide outstanding power transfer and smooth gear shifts while it's engineered to excel specifically with the Shimano 12-Speed road groupset systems.The Dura-Ace FC-R9200 chainset is the driving force at the heart of the bicycle. This chainset ensures that no portion of your pedal stroke is wasted. With hollow arms and chainrings, weight is kept to a minimum but stiffness and shifting precision is maximized.Hollowtech II Technology for World-Class Strength at a Low WeightThe Dura-Ace FC-R9200 crank performs two vital functions: transferring your pedalling effort into the drivetrain and ensuring the fastest, most precise front shifting available. With Hollowtech II crank arms to ensure lightweight and Shimano's class-leading chainring designs, the FC-R9200 won't let you down. And the FC-R9200 12 Speed Chainset is offered in even shorter crank arm lengths to ensure there are options to fit any rider.Hollowglide Chainring TechnologyHollow technology on the outer chainring. The Hollowglide construction ensures high rigidity while its hollow structure cuts down on weight yet maintains strength. This provides better power transfer and quicker and more precise front shifting performance.Hollowtech II Forged Crank ArmsA lightweight crankset not only reduces the bike's weight but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity.Shimano's advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high-quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight.The Best Balance of Stiffness, Strength and WeightThe concept of Hollowtech II technology is focused on producing a superior crankset that will maximize a rider's power transfer. The rigidity of the crankset ensures pedalling efficiency while its low weight, a key element of the crankset, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank.The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedalling stability, allowing for more efficient power transfer.The Shimano Dura-Ace R9200 12 Speed Chainset has been developed by pursuing the optimum balance of stiffness and rotating performance in a lightweight and beautiful crankset design.Features: Series: Dura-Ace R9200 Series Optimal balance of stiffness, strength, weight and rotational performance Hollowglide structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting New 54-40T option to realize the most efficient drivetrain Hollowtech II crank arms for strength at a low weight Recommended Bottom Bracket: Press-Fit: SM-BB92-41B; Threaded: BB-R9100 Q-Factor: 148mm Drivetrain Rear Speeds: 12-Speed Chainline: 44.5mm Weight: 714g (54-40T); 692g (52-36T); 685g (50-34T)A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
The HollowTech II 12-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite ridersHollow 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 12-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.