Chain Reaction UK

Chain Reaction UK Rating
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About Chain Reaction UK
Chain Reaction Cycles (CRC) are based in Doagh, in Northern Ireland, originally started out as Ballynure Cycles in 1984 and changing their name after a move to a new shop in 1989. In 2011 they opened a 10,000sq ft standalone retail store in Belfast, Northern Ireland. By 2013 they had become the largest online bike shop in the world!

CRC exists to deliver a world class shopping experience to cyclists around the globe, offering the lowest prices on everything you need to feed your cycling habit, and delivering directly to you with no fuss.
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We currently have 41186 products listed for Chain Reaction UK, that's 41186 opportunities for you to save money!

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Chain Reaction UK have 41186 products listed

Deda Elementi Alloy Headset Spacers (10 Pack) - Black - 10mm 1"1/8, Black
  • £14.99
  • RRP £16.99
  • Saving you £12

Deda Elementi Alloy Headset Spacers (10 Pack)Finish off your bike's cockpit in style and achieve the perfect stem/bar height with these Deda Elementi matt black anodised headset spacers.Features:  Material: 6061 series alloy  Finish: Black matt anodized  Heights: 3,5,10mm  For 1 1/8" headset (fork steerer outside 28.6mm)  Dimensions: Outside 34.0mm; inside 28.9mmBuy Deda Elementi Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Headset Bearing - Gold - 1.1/8", Gold
  • £14.99

Nukeproof Horizon Headset BearingThese replacement bearings are designed and developed by Nukeproof. They use the titanium coated race bearings with stainless steel balls. They have been designed for use in the harshest weathers and have went through various tests by the Nukeproof team during development so they are 100% confident in their performance. To back this up Nukeproof are offering a 5 year warranty on these bearings.Advanced Titanium CoatingThe titanium coating is applied using “Physical Vapour Deposition” which means that the material is vapourised in a vacuum environment and then deposited on the bearing races as a composition coating. This process allows the structure, density and stoichiometry of the coating to be controlled allowing the exact attributes in our design brief to be achieved. The coating is 0.000118” thick and has a molecular bond to the bearing races so it won’t wear off or corrode. The bearing is ABEC 5 certified which means that it has passed tests which include ID and OD tolerance’s, roundness of ball, trueness of faces & surfaces as well as noise testing at high RPM making it the perfect bearing for use in a headset.  Works with all Nukeproof headsets from 2015 onwards  Bearings sold individually Click here for fitting instructions.Features: 1 1/8" Bearing: Replacement bearing for all 1 1/8th Nukeproof headsets (Top Cups: T1 & T3, Bottom Cups B1-B4); Fits Nukeproof 1 1/8” headset cups for 1 1/8” steerer; Dimensions: 41.0mm x 45° x 45° 1.5" Bearing: Replacement bearing for 1.5” Nukeproof headsets (2015 onwards Bottom Cup B5 - B8); Fits Nukeproof 1.5” headset cups for 1.5” steerer; Dimensions: 51.8mm x 45° x 45°Specifications: 1 1/8" Bearing: 41.0mm x 45° x 45° - Weight 18g 1.5" Bearing: 51.8mm x 45° x 45° - Weight 31gBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Headset Bearing - Gold - 1.5", Gold
  • £14.99

Nukeproof Horizon Headset BearingThese replacement bearings are designed and developed by Nukeproof. They use the titanium coated race bearings with stainless steel balls. They have been designed for use in the harshest weathers and have went through various tests by the Nukeproof team during development so they are 100% confident in their performance. To back this up Nukeproof are offering a 5 year warranty on these bearings.Advanced Titanium CoatingThe titanium coating is applied using “Physical Vapour Deposition” which means that the material is vapourised in a vacuum environment and then deposited on the bearing races as a composition coating. This process allows the structure, density and stoichiometry of the coating to be controlled allowing the exact attributes in our design brief to be achieved. The coating is 0.000118” thick and has a molecular bond to the bearing races so it won’t wear off or corrode. The bearing is ABEC 5 certified which means that it has passed tests which include ID and OD tolerance’s, roundness of ball, trueness of faces & surfaces as well as noise testing at high RPM making it the perfect bearing for use in a headset.  Works with all Nukeproof headsets from 2015 onwards  Bearings sold individually Click here for fitting instructions.Features: 1 1/8" Bearing: Replacement bearing for all 1 1/8th Nukeproof headsets (Top Cups: T1 & T3, Bottom Cups B1-B4); Fits Nukeproof 1 1/8” headset cups for 1 1/8” steerer; Dimensions: 41.0mm x 45° x 45° 1.5" Bearing: Replacement bearing for 1.5” Nukeproof headsets (2015 onwards Bottom Cup B5 - B8); Fits Nukeproof 1.5” headset cups for 1.5” steerer; Dimensions: 51.8mm x 45° x 45°Specifications: 1 1/8" Bearing: 41.0mm x 45° x 45° - Weight 18g 1.5" Bearing: 51.8mm x 45° x 45° - Weight 31gBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Ritchey Upper Logic-E Integrated Headset Bearing - Silver - 1.1/8", Silver
  • £14.99
  • RRP £21.49
  • Saving you £30

Ritchey Upper Logic-E Integrated Headset BearingDesigned for ease of use, this 1.5" integrated IS upper headset is a solution designed to allow cables and wires to easily integrate with internal frame routing when using any standard stem - no special stem necessary. Cables and wires enter the headtube through channels on the headset upper, passing through the space between the fork steerer and headtube before continuing their route through the frame.Features: Material: Nylon and Glass Fibre Stack Height: 20.20mm Headtube ID: 52mm Headtube OD: 56mm S.H.I.S.: IS52/28.6 (1.5”) Bearings: 51.80/40mm 45°/45° - sealed cartridge (ACB) Weight: 93gBuy Ritchey Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Brand-X Semi Integrated 44IETS Sealed Headset - Black - 44IETS Sealed}, Black
  • £14.99
  • RRP £19.99
  • Saving you £25

Brand-X Semi Integrated 44IETS Sealed HeadsetThis headset uses sealed bearings and is designed to offer superior reliability, quality and performance at an exceptional price point. Brand-X has equipped it with a robust 6061 alloy construction for the best balance of strength and durability wherever your next ride takes you. Another highlight is this model's been put through a CNC forging and machining process to shave off any unnecessary excess material, while still preserving maximum toughness and strength. This results in a greater strength-to-weight ratio, so you can benefit from its hard-wearing reliability without any weight penalty. In addition, its angular contact sealed bearings ensure smooth, consistent operation in all weather conditions. Comes complete with a top cap and star nut to complement your ride.Features: Material: CNC forged and machined 6061 Alloy SHIS Norm: ZS44/28.6 I EC44/39.8 Height: 20.2 +/- 1mm Angular contact sealed bearings Includes: Top cap and Star NutManufacturer's Part Number: BXSINT44IETSH Black 44IETS SealedBuy Brand-X Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Brand-X Semi Integrated 44-56IITS Sealed Headset - Black - 44-56IITS Sealed}, Black
  • £14.99
  • RRP £19.99
  • Saving you £25

Brand-X Semi Integrated 44-56IITS Sealed HeadsetBoasting a tough 6061 alloy build, this semi-integrated headset provides a high level of toughness and durability as you tackle every ride. Brand-X has also put it through its CNC forging and machining process, which gives removes unnecessary excess material while maximising strength. This results in smooth and dependable performance without any weight penalty. Thanks to its sealed angular bearings, it's designed to offer superior reliability, quality and performance at an exceptional price point. Comes complete with a top cap and a star nut to complement your ride.Features: Material: CNC forged and machined 6061 Alloy SHIS Norm: ZS44/28.6 / ZS56/40 Height: 9.5 +/- 1mm Angular contact sealed bearings Includes: Top cap and Star NutManufacturer's Part Number: BXSINT44-56IITSH Black 44-56IITS SealedBuy Brand-X Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Ritchey Pro Headset Bearing - Silver - 51.9 x 40.0mm - 1.5" Taper, Silver
  • £14.99
  • RRP £17.99
  • Saving you £17

Ritchey Pro Headset BearingGenuine Ritchey replacement parts, the Pro Headset Bearings are compatible with frames with fully integrated headtubes and deliver super-smooth rotation for precise handling. An ideal addition to your road or mountain bike (MTB) these hard-wearing fully sealed angular contact bearings (ACBs) will maintain their performance in all riding conditions.Ritchey strives for at least twice the standard laid out by CEN (the European Committee which determines minimum safety standards for bicycles and components sold in Europe). By the time you put a Ritchey product on your bike, it has passed a global testing and approval process second to none.Features: Material: Steel Bearing Type: Angular contact Pro bearings (ACB) for Ritchey Fully Integrated headsets Angles: 45° / 45° Dimensions: Three separate options available, 41x30.15mm, 41.8x30.5mm and 51.9x40mm Width: 8mm Steerer Tube Compatibility: Separate 1.1/8" and 1.1/8"-1.5" options Contains: 2 bearings for Press Fit and Campy Spec options and only 1 bearing is supplied for Taper option Genuine Ritchey replacement parts Manufacturer's Part Numbers: 41mm: 200.HS247.178; 41.8mm: 200.HS247.173; 51.9mm: 200.HS247.175Please Note: The 41mm and 41.8mm options are a pair of headset bearings, the 51.9mm (1.5") Taper option is a single lower headset bearing only.Buy Ritchey Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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DMR DMR V6 Flat Pedals - Black with Reflector, Black with Reflector
  • £14.99
  • RRP £22.00
  • Saving you £32

DMR V6 Flat PedalsBased on DMR's race proven V12 flat MTB pedals, the V6 model is made from a lightweight but durable Nylon and adopts the same narrow profile and concave shaping that DMR is renowned for. Also, for simplicity and to save weight, these flat mountain bike pedals rotate on a Dual DU bush internal system rather than internal bearings. Moulded pins complete these pedal's simple, high performing and maintenance-free design.Reasons to Buy:Race-proven design.Lightweight and durable Nylon construction.Narrow profile with concave shaping.High-performing and maintenance-free.Features:Material: NylonAxle: ChromolyAxle Size: Standard 9/16"" threadBearing Type: N/A pedal use DU (dry unlubricated) bushings insteadSpare Pins Included: N/A as pins are mouldedDual DU bush systemLightweight and durable Nylon construction.Narrow profile with concave shaping.Full length off-road pinsNon-serviceable designWeight: 327g (pair)Buy DMR Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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microSHIFT Marvo LT T382B 2x8sp Front Derailleur - Black - Dual Pull}, Black
  • £14.99

microSHIFT Marvo LT T382B 2x8sp Front DerailleurEngineered for trekking, this front derailleur is equipped with a robust aluminium outer link construction, which ensures excellent strength and durability whether you're commuting or planning a weekend adventure. microSHIFT has also kitted out this model with a Shimano Mountain compatible design, making it easy to integrate alongside your existing Shimano MTB 8 speed drivetrain components. Another highlight is its dual pull cable routing, which ensures smooth and reliable shifting performance as you tackle the mixed terrain conditions on your travels. Weighing in at only 152g, this is a lightweight choice of upgrade that delivers stiff and strong actuation without adding any unnecessary excess grams.Trekking Bike Front Derailleur with Dual Pull Cable RoutingMaking front derailleurs that work well is equal parts, art and science. microSHIFT combines meticulous design details with precision manufacturing to deliver front derailleurs that shift predictably and smoothly. Stiff, strong mounting hardware and sensible cable routing round everything out into an easy to use package.Features: Outer Link Material: Steel Use: Trekking (Compatible with Shimano Mountain) Speed: 8 speed Chainring Compatibility: Double Mount: Band Clamp 34.9 (31.8 adaptor) Cable Route: Dual Pull Chainstay Angle: 63-68 angle Capacity: 16T Top Gear Teeth: 44-48T Chainline: 48.8mm Weight: 152gTechnologies: Precision-forged steel shifting plate.Manufacturer's Part Numbers: FD-T382B Black/Silver Dual PullBuy microSHIFT Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Jockey Wheels for Shimano - SRAM - Black - 13t / 13t}, Black
  • £14.99
  • RRP £19.99
  • Saving you £25

Nukeproof Jockey Wheels for Shimano / SRAMOffering a significant upgrade over standard-fitted jockeys, these jockey wheels are designed in-house by Nukeproof for SRAM and Shimano derailleurs. Available in 10, 11 and 12 speed, Nukeproof has an option to suit most current derailleurs.Manufactured from hard-wearing lightweight polyoxymethylene plastic with a stainless-steel bearing, these jockey wheels are designed for durability and longer service life. The unique narrow-wide tooth profile design also allows for better shifting and reduced noise from your drivetrain.The Shimano options have a longer tooth on the top sprocket to improve shifting, the lower jockey wheel has a shorter tooth profile to reduce noise and increase efficiency.The SRAM options have a specific narrow-wide profile to perfectly fit the chain providing a crisper shift, smoother drive train and reduced noise.Click here to view and download Nukeproof's Jockey Wheel GuideFeatures: Nukeproof Design Narrow-Wide profiles specific to Shimano and SRAM Stainless Steel Bearings Durable Lightweight Polyoxymethylene Plastic Jockey Wheels 2 Year Warranty (not including bearings) Please use our Jockey Wheel Guide link above to confirm rear derailleur compatibilityBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Jockey Wheels for Shimano - SRAM - Black - 12t / 12t}, Black
  • £14.99
  • RRP £19.99
  • Saving you £25

Nukeproof Jockey Wheels for Shimano / SRAMOffering a significant upgrade over standard-fitted jockeys, these jockey wheels are designed in-house by Nukeproof for SRAM and Shimano derailleurs. Available in 10, 11 and 12 speed, Nukeproof has an option to suit most current derailleurs.Manufactured from hard-wearing lightweight polyoxymethylene plastic with a stainless-steel bearing, these jockey wheels are designed for durability and longer service life. The unique narrow-wide tooth profile design also allows for better shifting and reduced noise from your drivetrain.The Shimano options have a longer tooth on the top sprocket to improve shifting, the lower jockey wheel has a shorter tooth profile to reduce noise and increase efficiency.The SRAM options have a specific narrow-wide profile to perfectly fit the chain providing a crisper shift, smoother drive train and reduced noise.Click here to view and download Nukeproof's Jockey Wheel GuideFeatures: Nukeproof Design Narrow-Wide profiles specific to Shimano and SRAM Stainless Steel Bearings Durable Lightweight Polyoxymethylene Plastic Jockey Wheels 2 Year Warranty (not including bearings) Please use our Jockey Wheel Guide link above to confirm rear derailleur compatibilityBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Jockey Wheels for Shimano - SRAM - Black - 11t / 11t}, Black
  • £14.99
  • RRP £19.99
  • Saving you £25

Nukeproof Jockey Wheels for Shimano / SRAMOffering a significant upgrade over standard-fitted jockeys, these jockey wheels are designed in-house by Nukeproof for SRAM and Shimano derailleurs. Available in 10, 11 and 12 speed, Nukeproof has an option to suit most current derailleurs.Manufactured from hard-wearing lightweight polyoxymethylene plastic with a stainless-steel bearing, these jockey wheels are designed for durability and longer service life. The unique narrow-wide tooth profile design also allows for better shifting and reduced noise from your drivetrain.The Shimano options have a longer tooth on the top sprocket to improve shifting, the lower jockey wheel has a shorter tooth profile to reduce noise and increase efficiency.The SRAM options have a specific narrow-wide profile to perfectly fit the chain providing a crisper shift, smoother drive train and reduced noise.Click here to view and download Nukeproof's Jockey Wheel GuideFeatures: Nukeproof Design Narrow-Wide profiles specific to Shimano and SRAM Stainless Steel Bearings Durable Lightweight Polyoxymethylene Plastic Jockey Wheels 2 Year Warranty (not including bearings) Please use our Jockey Wheel Guide link above to confirm rear derailleur compatibilityBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Scalp Derailleur Hanger
  • £14.99

Nukeproof Scalp Gear Hanger Scalp gear hanger constructed from machined alloy. Features: Machine alloy construction Comes with fixing bolt Compatible with the 2011 ScalpBuy Nukeproof Frame Spares from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Mega and Rook Derailleur Hanger
  • £14.99

Nukeproof Mega 2012/Rook Gear HangerThe Nukeproof Mega Gear Hanger is a Machined alloy Nukeproof replacement gear hanger compatible with the 2011 Mega, 2012 Mega and the Rook.Buy Nukeproof Frame Spares from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Kool Stop MTB Dual Compound Pair Of Brake Blocks - V-Brake}
  • £14.99

Kool Stop MTB Dual Compound Pair Of Brake Blocks The Kool Stop MTB Dual Compound are the ultimate in mountain bike V-brake pads. Shaped to follow the curve of the rim and feature a dual compound to provide the perfect balance of stopping power and longevity in all weather conditions.Features: Use: V-brakeMount: ThreadedWeight: 58g (pair)Buy Kool Stop Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Kool Stop D330TK SRAM Aero Pro Disc Brake Pads - Black - Sintered}, Black
  • £14.99
  • RRP £28.99
  • Saving you £48

Kool Stop D330TK SRAM Aero Pro Disc Brake PadsThis superb brake pad set is specifically designed for use with Formula Mega, The One, C1, R1, RX, RO, T1, CR3 disc brakes. Additionally, its superior braking power makes this model the perfect choice of replacement for your old or worn out existing pads.Features: Compatibility: Formula Mega, The One, C1, R1, RX, RO, T1, CR3 disc brakes Pad Type: Sintered Weight: 18g (pair)Buy Kool Stop Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Kool Stop D310 Formula B4-XC-FR-DH-B4 Disc Pads - Black - Alloy Backed}, Black
  • £14.99
  • RRP £20.99
  • Saving you £29

Kool Stop D310 Formula B4/XC/FR/DH/B4 Disc PadsThese high-quality brake pads are specifically designed for use with Formula B4/Racing XC, FR, DH and B4 disc brakes. Perfect for replacing your old or worn out existing pads, these provide you with excellent braking power and control on every run. Weighing in at only 22g (approx), this are an ideal choice for riders who want to enjoy efficient stopping performance without adding unnecessary grams to your ride. Features:  Type: Disc  Compatibility: Formula B4/Racing XC, FR, DH and B4 disc brakes  Part Number: D310  Weight: 22g (approx)Buy Kool Stop Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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SwissStop RX Plus Shimano XTR-XT Brake Pads - Original Black - 2x Pairs - Pads Only}, Original Black
  • £14.99
  • RRP £17.99
  • Saving you £17

SwissStop RX Plus Brake Pads - Shimano XTR/XTSwissStop brake pads deliver more than just great stopping power. They provide superior modulation and feel on all types of brake surfaces from Aluminium to carbon.The rubber compounds created are the foundation for the SwissStop line of brake pads. Special formulas have been developed for Aluminium and carbon wheels. Decades of experience stand behind every SwissStop product.Features:Top performance on dry rims and even better performance on wetComplete absence of abrasive materials which damage rimsConsistent braking (-20°C to +40°C)Silent operationCompounds:Power Black: Suitable for less aggressive riding, very good in dry & wet conditions. Specifically recommended for rims made of softer alloy.GHP II: High performance compound for Aluminium rims. Excellent in the dry and unbeatable in the rain. Extremely low pad and rim wear.Buy SwissStop Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Hope Tech 3 Shifter Mount - Left - SRAM - HBSP 325}
  • £14.99
  • RRP £16.50
  • Saving you £9

Hope Tech 3 Shifter MountIf you're running Hope Tech 3 disc brakes with higher-end SRAM shifters, this adaptor will clean up your cockpit. Designed to combine your lever with a range of SRAM shifters, it will free up space on your mountain bike's handlebars.Click HERE for the Shifter Mount selection chart.Reasons to Buy: Cleaner appearance. Free's up valuable handlebar space.Features: Material: CNC machined aluminium Finish: Anodised Compatibility Levers: Hope Tech 3 only Shifters Compatibility: SRAM XX, XX1, X.0 and X.9 Included: Adapter (Left, Right or Both options), screws Designed, tested and manufactured in England at the Hope plant in Barnoldswick Weight: 16gBuy Hope Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Vitus Auro Frame Cable Guide Kit - Black, Black
  • £14.99

Vitus Auro Frame Cable Guide Kit Compatible with Vitus Auro TT bikes, this kit is used to fill the holes at cable entry and exit points on your frame. Features: For use with TT bikesCompatible with Vitus Auro bike with rim brakes Includes all cable guide partsBuy Vitus Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.

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