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SRAM X01 XG-1195 11-Speed Cassette
  • £333.90
  • RRP £371.00
  • Saving you £10

Machined from a single 4130 chromoly ingot, the main body of the Sram X01 11 speed cassette is a sight to behold, and that is before we have even got on to the behemoth that is the 42 tooth aluminium constructed cog which is press-fitted to the main body. A true beauty the Sram 11 speed cassette is constructed almost identically to that of the XX1, however uses a slightly different finish giving it the unique stealthy look (if you can call a cassette this size  - stealthy ) The X-Dome structure of the X01 gives you a wide spread of speeds (10-12-14-16-18-21-24-28-32-36-42) whilst keeping the jumps between them nice and even.

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Shimano XTR M9100 12 Speed Cassette Cassettes
  • £329.99

The XTR M9100 12 Speed Cassette has been created with an increased transmission ratio, is 30% stiffer than previous models and keeps a lower weight to maximise efficiency when making those vital shifts. Equipped with a 10-45 or 10-51 teeth system, cadence jumps when moving between gears are kept low to maintain high-speeds and steady rhythm as you blast through your run.  Featuring Hyperglide+ technology, the cassette benefits from small shifting ramps leading the chain to the next sprocket when going up through the gears and on the way back down, stopping the chain from dismounting. This ensures consistent gear-stepping at all times with no impact to your cadence.  A fantastic set of sprockets for the thrill-seeking trail and downhill rider, the XTR M9100 12 Speed Cassette is more than equipped for the rowdiest of rides. 

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CeramicSpeed Oversized Pulley Wheel System Coated Rear Derailleurs
  • £329.99
  • RRP £445.99
  • Saving you £26

The cage is made from carbon fibre and reinforced PA while the 17-tooth pulley wheels are made from aluminium and mounted with high quality CeramicSpeed coated bearings. The revolutionary OSPW System is mounted with CeramicSpeed coated bearings, which means it has undergone a special coating treatment to provide even more protection and lower friction. A very thin protective coating is applied to the bearing races, which further increase the resistance to corrosion or damage from foreign objects. The OSPW has been tested and confirmed to be the world’s fastest pulley wheel system, therefore enhancing your performance with free speed, which gives you a more efficient drivetrain. Like all other products delivered by CeramicSpeed, this product has undergone a thorough testing program and is used by professional triathletes Tim Don and Tyler Butterfield. Maintenance It’s important that you properly lubricate your bearings in order to ensure optimal performance and maximum longevity. Add oil to the outside of the bearing seal, so that oil can penetrate the bearing. Do this when you lubricate your chain, or if you have washed your bike or have been riding in wet or muddy conditions. Size Information 101638 Black 17T Shimano 10/11 9000/6800  101651 Black 17/17T SRAM eTap  101661 Black 17T SRAM RED/Force 10/11 Mechanical fits up to 32-tooth cassettes 104063 Black 13/19T Campagnolo 11s EPS/Mechanical fits up to 32-tooth cassettes  ** 101643 Red 17T Shimano 10/11 9000/6800  101655 Red 17/17T SRAM eTap  101665 Red 17T SRAM RED/Force 10/11 Mechanical fits up to 32-tooth cassettes 104064 Red 13/19T Campagnolo 11s EPS/Mechanical fits up to 32-tooth cassettes  ** (**Not compatible with Campagnolo 12-speed Record and Super Record derailleurs)

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Shimano ST-7970 Dura-Ace Di2 10 Speed Double STI Levers
  • £329.99
  • RRP £549.99
  • Saving you £40

The most advanced level of shifting technology: at the touch of a switch Dura-Ace Di2 is quick shifting, smooth, and effortless, making for unmatched drivetrain efficiency.Key Features:The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also gives effortless gear shifts,Simply pressing tactile buttons allows effortless and 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,Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and a titanium clamp band / fixing bolt,Brake lever pivot is positioned to increase power giving excellent ergonomics when riding on the hoods,Finely tuneable reach adjusters for the levers enable custom fitment for all hands,The Di2 STIs are also compatible with the FlightDeck computer (SC-7900), measuring important data such as heart rate, altitude, cadence, gear position, battery indicator, and more,Levers are supplied without electrical cables, as these need to be ordered separately to suit,Weight is 255 grams a pair.

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Shimano XTR M9120 12 Speed Crankset Cranksets
  • £329.99
  • RRP £344.99
  • Saving you £4

All set for adventurous rides, this stunning component features a sturdy aluminium construction which makes it more than capable of handling the challenges of an all-day epic. Delivered as the crankset only, it is equipped with a 1x and 2x compatible direct mount transmission which allows you to choose a chainring size that best suits your riding style separately. This is the ultimate choice of upgrade for riders who want more freedom to customise your crank setup for achieving a podium-topping finish. Please Note: This product page is for the Crankset only, chainring sold separately. Technologies: Providing the best balance of stiffness, strength, weight and rotating performance The concept of HOLLOWTECH II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, 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. HOLLOWTECH technology is an ultra-lightweight hollow crankarm created by SHIMANO with the company’s own proprietary forging technology that also maintains rigidity. The addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.

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Shimano Ultegra R8150 Di2 12 Speed Rear Derailleur Rear Derailleurs
  • £329.99
  • RRP £379.99
  • Saving you £13

Now simplified with a single derailleur cage length, the new 12-Speed Shimano Ultegra R8150 rear derailleur packs the fastest, most precise shifting on the market into a more affordable option. With the fastest, most accurate shifting on the market, the new 12-Speed Ultegra R8150 rear derailleur is more versatile than ever thanks to a single cage length option compatible with 11-28, 11-30, and 11-34 cassettes. Shimano Di2 Electronic Drivetrain Performance Thanks to its lightning-fast, accurate, and reliable shifting performance, Di2 puts riders in complete control and ensures a seamless interface between the cyclist and bike like never before. Creating and continually improving the world's best shifting is a complicated undertaking requiring constant technological advancements. From hardware to software, Shimano Di2 technology is on the cutting edge, striving to deliver the best rider experience possible now and in the future. Shimano E-Tube Compatible E-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. Direct Mount Compatible Rear wheels are easier to remove with a mounting option for SHIMANO SHADOW RD and SHIMANO SHADOW RD+. The direct mount feature is designed to suit a wide range of contemporary frames with large-section chainstays, in particular, mountain bikes with thru-axle dropouts. Shimano Shadow Low-Profile Rear Derailleur The mechanism rear derailleur, Shimano Shadow RD, is intended for more aggressive riding. Its super low profile design carries many benefits. Because of its low profile and single tension construction, the derailleur does not hit the chain stay in rough riding conditions. The result is smooth and silent performance.

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Shimano Dura-Ace R9200 12 Speed Cassette - Silver - 11-28t}, Silver
  • £329.99

Shimano Dura-Ace R9200 12 Speed CassetteThe Dura-Ace R9200 12 Speed Cassette from Shimano provides fast, smooth and seamless gear shifting performance anywhere. The Dura-Ace 12-Speed gear system is a top-level gearset, and this cassette offers a wide gear range that's reliable, efficient and lightweight.The uninterrupted shifting experience of the Dura-Ace R9200 12-speed cassette range lets you climb, sprint, and push your limits without stopping to think about your next gear change. Larger driving cogs maximize drivetrain efficiency and create compatibility with both Shimano 11 and 12-speed freehub bodies. Shimano HYPERGLIDE+ Gear Shifting PrecisionHYPERGLIDE+ cassettes have revolutionized off-road shifting with their seamless shifts both up and down the gear range. Now it's time for technology to change road cycling. Even during maximal efforts up a climb or nearing the finish line, riders no longer need to back off to perform a shift. In any gear, Dura-Ace R9250 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing 11-speed freehub bodies. All this while increasing to 12-gears and without increasing weight, Dura-Ace CS-R9200 cassettes are the new paradigm in road shifting. Features: Series: Dura-Ace R9200 Series Faster, seamless shifts under maximum pedalling load Refined 12 step gear combination provides peak efficiency and accelerating performance for every situation Add wider 34T spec for pro-race usage Compatible with new 12-Speed and road 11-Speed Freehub body Gear Combination: 11-12-13-14-15-16-17-19-21-24-27-30T / 11-12-13-14-15-17-19-21-24-27-30-34T Type: HYPERGLIDE+ Compatible Chain: Shimano HG 12-Speed Weight: 223g (11-30T); 253g (11-34T)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.

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CeramicSpeed OSPW System SRAM Mechanical - Red - Short Cage, Red
  • £329.99
  • RRP £445.99
  • Saving you £26

CeramicSpeed OSPW System SRAM MechanicalThis OSPW System SRAM Mechanical from CeramicSpeed is an advanced rear derailleur pulley system that offers fast, efficient and smooth drivetrain performance. Ideal for use with SRAM Red and Force 10 and 11-Speed groupsets, this OSPW System includes industry-leading bearings and pulley wheels for enhanced power output.The unique oversized design provides riders of this Oversized Pulley Wheel System with efficiency savings starting at 40% over stock SRAM derailleur pulley wheels. This specific SRAM Mechanical version of the Oversized Pulley Wheel System is only compatible with RAM Red and SRAM Force 10 and 11-Speed mechanical rear derailleurs. The OSPW System for SRAM mechanical derailleurs is compatible with both short cage and WiFli derailleur bodies. This system for SRAM features two oversized 17-tooth aluminium pulley wheels which are housed within a robust cage crafted from a compound of polyamide (PA) and carbon fibre. The OSPW System for SRAM fits up to 32-tooth cassettes. This revolutionary OSPW System is developed, produced and assembled by hand in Denmark. This plug-and-play product is the result of an in-depth development process and has been designed for optimal performance. Created to answer the need for less friction (as much as 60%), increased speed and a more efficient drivetrain. This OSPW System helps you ride any distance comfortably. The optimisation of your drivetrain with the new CeramicSpeed OSPW System delivers access to industry-leading efficiency. The use of high-quality materials means this system will outlast other commonly used pulley wheels on the market. Like all other products delivered by CeramicSpeed, this product has undergone a thorough testing program and is used by professional triathletes Tim Don and Tyler Butterfield. Since its introduction in 2015, the CeramicSpeed Oversized Pulley Wheel System has been through 13 unique derailleur compatibility developments. No other pulley system has the depth of use and trust as the CeramicSpeed OSPW, which counts both Men's and Women's Triathlon World Champions, World Tour professional road teams, XCO professional MTB Teams, and elite athletes worldwide as its users. Features: Compatibility: SRAM Red and SRAM Force - 10 and 11 speed Fits up to 32-tooth cassettes They offer 3-5 times longer lifetime than the commonly used standard pulleys on the market In The Box: Oversized Pulley Wheel System CeramicSpeed Bearing Oli in 15ml dropper bottle Sticker SheetBuy CeramicSpeed Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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CeramicSpeed OSPW System - Campagnolo - Coated - Black, Black
  • £329.99
  • RRP £445.99
  • Saving you £26

CeramicSpeed Oversized Pulley Wheel SystemThe cage is made from carbon fibre and reinforced PA while the 17-tooth pulley wheels are made from aluminium and mounted with high quality CeramicSpeed coated bearings.The revolutionary OSPW System is mounted with CeramicSpeed coated bearings, which means it has undergone a special coating treatment to provide even more protection and lower friction. A very thin protective coating is applied to the bearing races, which further increase the resistance to corrosion or damage from foreign objects.The OSPW has been tested and confirmed to be the world's fastest pulley wheel system, therefore enhancing your performance with free speed, which gives you a more efficient drivetrain.Like all other products delivered by CeramicSpeed, this product has undergone a thorough testing program and is used by professional triathletes Tim Don and Tyler Butterfield.Features: Material: Carbon/PA Cage, Aluminium Pulley Wheels Speed: 10 or 11 speed Compatibility: Campagnolo Weight: 57gMaintenanceIt's important that you properly lubricate your bearings in order to ensure optimal performance and maximum longevity. Add oil to the outside of the bearing seal, so that oil can penetrate the bearing. Do this when you lubricate your chain, or if you have washed your bike or have been riding in wet or muddy conditions.Buy CeramicSpeed Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Campagnolo Record HO 11 Speed Rear Derailleur Rear Derailleurs
  • £328.49
  • RRP £334.99
  • Saving you £2

It has been finely tuned down to the smallest detail to obtain the maximum effectiveness. The Record™ rear derailleur ensures speed and precision in every situation. Disc Brake Frame Specific This HO (Hydraulically Optimised) version is specifically designed for use on disc brake frames that feature the wider 12x142mm rear dropout spacing. It features an adapted mounting link for easier thru axle removal and larger teeth on the upper pulley for precise shifting at more extreme chainlines.

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Shimano Dura Ace R9200 12 Speed Cassette
  • £324.99
  • RRP £329.99
  • Saving you £2

Super lightweight 12speed HG+ cassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changesHyperglide+ 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 12-speed chains.

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Shimano XTR M9100 12 Speed Cassette - Black-Silver - 10-45t}, Black-Silver
  • £324.99

Shimano XTR M9100 12 Speed CassetteThe Shimano XTR M9100 12 Speed Cassette provides the smoothest, fastest and most reliable shifting performance imaginable. Featuring the new Hyperglide+ technology, which delivers the highest level of superior shifting, power-transfer and shifting stability.This cassette design is stiffer, lighter and more durable than anything that has come before it, combining titanium, aluminium and steel where it is best suited, this cassette is optimised for the toughest and most demanding rigours of mountain biking.Superb Shifting Smoothness Anywhere on the MountainDesigned with two intentions, the 10-45T cluster, featuring the Rhythm Step spec for exceptional Cross-Country shifting smoothness. This wide range can tackle any scenario and provide superb, smooth and consistent performance throughout the range of the cassette. The second gear cluster option is the Wide Range spec, which has been optimised for Enduro. providing exceptional shifting performance and reliability as the Rhythm Step does but has a huge 51T sprocket at the low end so you can climb any mountain gradient with ease.Features:Material: 5x Sprockets: Titanium; 3x Sprockets, Spider, Lock-Ring: Aluminium; 4x Sprockets: SteelUse: Mountain BikeDrivetrain Speed: 12-SpeedGearing Options: 10-45T (12-Speed Rhythm Step spec for Cross Country); 10-51T (12-speed Wide Range spec for Enduro)Freehub Engagement: Shimano Micro-SplineCompatible Chain: Shimano CN-M9100Spider Arm: OneType: HYPERGLIDE+Cassette Ratio: 10-45T (10-12-14-16-18-21-24-28-32-36-40-45T); 10-51T (10-12-14-16-18-21-24-28-33-39-45-51T)Part No: CS-M9100-12Weight: 349g (10-45T); 359g (10-52T)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.

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