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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Number of Products Listed for Chain Reaction UK

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 Zero1 Seatpost - Black - 27.2mm, Black
  • £19.99
  • RRP £23.99
  • Saving you £17

Deda Elementi Zero1 SeatpostNew design from Deda offers an easy twin-bolt adjustment. 6061 light alloy, 3D deep forged, two M6 seat clamp bolts.Features:Diameter: 31.6mm.Length: 350mm.Setback: 21mm.Weight: 333g (31.6mm).Buy Deda Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Cinelli Pista Track Bike Stem - Black - 1.1/8", Black
  • £19.99

Cinelli Pista Track Bike StemWith its 65° angle for aggressive indoor racing, the Pista Track Bike Stem will put you in the ideal position for ultra-efficient sprinting. Cinelli has made it from 6061 T6 aluminium alloy, which brings you the ideal mix of rigidity and low weight. Finished off with bold Cinelli side decals and a laser-etched faceplate, this race-ready component will enhance the looks of modern and classic bikes.Features: Material AL 6061 T6 (body and front cap) Bolt Material: Chromium-plated Steel, 12.9mm, Front: M5; Rear: M6 Handlebar Clamp Diameter: 31.8mm Steerer Tube Clamp Diameter: 1.1/8" (28.6mm) Stem Angle: 65° Invertible: No Stem Cap Included: No Weight: 180gBuy Cinelli Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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ITM Alcor 80 Road Stem - Black - 1.1/8", Black
  • £19.99
  • RRP £33.99
  • Saving you £41

ITM Alcor 80 Road StemThe ITM Alcor 80 stem is made from 6061 T6 alloy that has been 3D forged. This means it is very light and incredibly strong and stiff. The stem features a 10° drop that can be flipped to give a low, aggressive position or an upright and comfortable one. It features a 31.8mm clamp size.Features: Material: AL 6061 T6 alloy Angle: 10° Steerer Clamp Size: 1.1/8" Bar Clamp Size: 31.8mmBuy ITM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Funn Funnduro 35 Mountain Bike Stem - Blue - 1.1/8", Blue
  • £19.99
  • RRP £44.99
  • Saving you £56

Funn Funnduro 35 Mountain Bike StemFunn's Funnduro 35 Stem was built with Enduro riders in mind and this stem is light enough for XC race bikes yet tough enough for DH bikes. The Funnduro is made from 6061 aluminium which has been fully CNC machined and is lightweight, weighing between 112g and 128g depending on the length.Features:Material: AL6061, full CNCFinish: Bead blastStack Height: 32mmRise: 0°Bar Clamp Diameter: 35mmWeight: Between 112g and 128gBuy Funn Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Neutron AM Stem - Black - Grey - 1.1/8", Black - Grey
  • £19.99
  • RRP £29.99
  • Saving you £33

Nukeproof Neutron AM StemConstructed with high-quality 6061 aluminium and cold-forged to optimise its strength, Nukeproof has ensured the Neutron AM stem is ready for anything. It’s strong enough for the toughest downhill trail, yet as it has also been CNC machined to remove unnecessary weight its light enough for trail rides too.Ultimate Strength and StiffnessNukeproof has redesigned the four-bolt faceplate system to shave some weight whilst retaining strength, which offers maximum security against bar slippage. The ultra-wide clamping area provides exceptional stiffness and security, and the low stack height provides more cockpit tuning possibilities.Features: Material: 6061 Alloy Stack Height: 40mm Offset: 0 deg Mounting System: Standard 6 bolt Invertible: No Compatibility: 1 1/8" steerers and separate 31.8mm or 35mm bar clamp options Stem Cap Included: No Weight: 185gBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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SE Bikes Narler BMX Stem - Black - 55mm Reach - 28mm Stack}, Black
  • £19.99
  • RRP £39.99
  • Saving you £50

SE Bikes Narler BMX StemDesigned for use with BMX bikes, the SE Bikes Narler Stem takes its name from the famous Southern California BMX track. Made from a durable, hard-wearing CNC machined 6061 T6 aluminium and featuring Chromoly bolts, it can be mounted either way, enabling you to have a raised and relaxed ride or a rough and more aggressive one.Features:Material: CNC machined 6061 T6 Aluminium Bolts: Chromoly (CrMo) Reach: 55mm Stack Height: 28mmSE Wing logo on top and bottomCan it be Inverted: Yes Weight: 382gBuy SE Bikes Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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SE Bikes Narler BMX Stem - Blue - 55mm Reach - 28mm Stack}, Blue
  • £19.99
  • RRP £39.99
  • Saving you £50

SE Bikes Narler BMX StemDesigned for use with BMX bikes, the SE Bikes Narler Stem takes its name from the famous Southern California BMX track. Made from a durable, hard-wearing CNC machined 6061 T6 aluminium and featuring Chromoly bolts, it can be mounted either way, enabling you to have a raised and relaxed ride or a rough and more aggressive one.Features:Material: CNC machined 6061 T6 Aluminium Bolts: Chromoly (CrMo) Reach: 55mm Stack Height: 28mmSE Wing logo on top and bottomCan it be Inverted: Yes Weight: 382gBuy SE Bikes Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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SE Bikes Narler BMX Stem - Gold - 55mm Reach - 28mm Stack}, Gold
  • £19.99
  • RRP £39.99
  • Saving you £50

SE Bikes Narler BMX StemDesigned for use with BMX bikes, the SE Bikes Narler Stem takes its name from the famous Southern California BMX track. Made from a durable, hard-wearing CNC machined 6061 T6 aluminium and featuring Chromoly bolts, it can be mounted either way, enabling you to have a raised and relaxed ride or a rough and more aggressive one.Features:Material: CNC machined 6061 T6 Aluminium Bolts: Chromoly (CrMo) Reach: 55mm Stack Height: 28mmSE Wing logo on top and bottomCan it be Inverted: Yes Weight: 382gBuy SE Bikes Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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SE Bikes Narler BMX Stem - Red - 55mm Reach - 28mm Stack}, Red
  • £19.99
  • RRP £39.99
  • Saving you £50

SE Bikes Narler BMX StemDesigned for use with BMX bikes, the SE Bikes Narler Stem takes its name from the famous Southern California BMX track. Made from a durable, hard-wearing CNC machined 6061 T6 aluminium and featuring Chromoly bolts, it can be mounted either way, enabling you to have a raised and relaxed ride or a rough and more aggressive one.Features:Material: CNC machined 6061 T6 Aluminium Bolts: Chromoly (CrMo) Reach: 55mm Stack Height: 28mmSE Wing logo on top and bottomCan it be Inverted: Yes Weight: 382gBuy SE Bikes Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Most Tiger Ultra 3k Carbon Stem - White - 1.1/8", White
  • £19.99
  • RRP £55.90
  • Saving you £64

Most Tiger Ultra 3k Carbon StemFeaturing a forged aluminium construction that's wrapped in 3K carbon fibre, this high-quality road bike stem offers exceptional strength and durability without any unnecessary weight. Thanks to its tough aluminium build it delivers a strong connection between your handlebar and your road bike's steerer tube. Its special carbon properties also add stiffness, while keeping its overall weight reduced. Coming complete with sleek graphics to complement your ride, this stem is a great choice of upgrade for reliable performance and aerodynamics on your road bike.Features: Material: Forged Aluminium 3K Carbon Use: Road Handlebar Clamp Diameter: 31.8mm Steerer Diameter: 1 1/8"Buy Most Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Ritchey Comp Press Fit ZS 1.5 Tapered Headset - Black - ZS44-55}, Black
  • £19.99
  • RRP £28.99
  • Saving you £31

Ritchey Comp Press Fit ZS 1.5 Tapered HeadsetMade from an advanced alloy and equipped with semi-sealed cartridge beatings, the Comp Press Fit Headset delivers the smooth operation, reliability and low weight that Ritchey components are renowned for. Compatible with tapered steerer tubes and bike frames with tapered 44/55mm headtubes, it will bring you precise steering and all-weather durability.Features: Material: Ritchey high-quality Alloy, Comp Chromoly (CrMo) top bearing cover Type: Semi integrated Steerer Tube Compatibility: Tapered 1.1/8" to 1.5" Bearing Type: Semi cartridge bearings Crown Race Included: Yes Star Nut and Top Cap Included: Yes Stack Height: 11.3mm Upper Standard Headset Information System (S.H.I.S): ZS44/28.6 Lower S.H.I.S: ZS55/40 Upper Headtube Outer Diameter / Inner Diameter: 50/44mm Lower Headtube Outer Diameter / Inner Diameter: 61/55mm Manufacturer's Part Number: 200.HS247.420 Weight: 103gBuy Ritchey Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Neutron Top Headset Cup - Black - EX34-28.6 - T1, Black
  • £19.99

Nukeproof Neutron Top Headset CupThis Nukeproof headset is compatible with the bearings from the Nukeproof Steel Bearing or the upgraded Nukeproof Ti coated bearing with stainless balls. Designed to ensure the highest performance for tough and challenging conditions, these headsets have been engineered with durability and quality in mind.The latest generation of headsets has been revised, improved and expanded for optimum fit, sealing and performance as well as compatibility with a wide range of fork and frame standards. Featuring sealed angular contact bearings, split alloy crown races and upper and lower bearing cups CNC-machined from proprietary aluminium, the headset offers the optimum balance of lightweight, strength and durability for performance across all riding disciplines.The is available in a range of options to cover multiple fork/headtube configurations, including a full range of Standard Steerer (SS–1-1/8') and Tapered Steerer (TS–1-1/8' to 1.5') combinations. Internal and external cup options also available including zero-stack versions with internal top and bottom cups.All models feature a super tough black hard anodised finish, with laser-etched graphics.Don't know which headset you need? No problem! Simply use our Headset Technical Guide which includes a Headset Finder.Features:Specific Top Headset cupReplaceable angular contact bearingsLaser-etched graphics (including code)Split Alloy Crown Race for easy installation/removal Hard Anodised FinishInternal and external optionsReducer crown race for 1.5' availableBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Neutron Top Headset Cup - Black - ZS44-28.6 - T2, Black
  • £19.99

Nukeproof Neutron Top Headset CupThis Nukeproof headset is compatible with the bearings from the Nukeproof Steel Bearing or the upgraded Nukeproof Ti coated bearing with stainless balls. Designed to ensure the highest performance for tough and challenging conditions, these headsets have been engineered with durability and quality in mind.The latest generation of headsets has been revised, improved and expanded for optimum fit, sealing and performance as well as compatibility with a wide range of fork and frame standards. Featuring sealed angular contact bearings, split alloy crown races and upper and lower bearing cups CNC-machined from proprietary aluminium, the headset offers the optimum balance of lightweight, strength and durability for performance across all riding disciplines.The is available in a range of options to cover multiple fork/headtube configurations, including a full range of Standard Steerer (SS–1-1/8') and Tapered Steerer (TS–1-1/8' to 1.5') combinations. Internal and external cup options also available including zero-stack versions with internal top and bottom cups.All models feature a super tough black hard anodised finish, with laser-etched graphics.Don't know which headset you need? No problem! Simply use our Headset Technical Guide which includes a Headset Finder.Features:Specific Top Headset cupReplaceable angular contact bearingsLaser-etched graphics (including code)Split Alloy Crown Race for easy installation/removal Hard Anodised FinishInternal and external optionsReducer crown race for 1.5' availableBuy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Ritchey WCS Drop In Upper Integrated Headset Cup - Black - TC 15.3mm IS42/28.6, Black
  • £19.99
  • RRP £33.00
  • Saving you £39

Ritchey WCS Drop In Upper Integrated Headset CupWCS (WORLD CHAMPIONSHIP SERIES) - These words evoke the core philosophy behind Ritcheys highest performance components. The rainbow stripe WCS logo represents the numerous world champions that have won on Ritchey.The WCS line is the gold standard for lightweight, bombproof race parts and cutting edge innovation.Features: Drop-in style headset uppers Titanium coated high quality, long lasting bearings only featured in WCSBuy Ritchey Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Deda Elementi Carbon Headset Spacers (10 Pack) - 5mm 1"1/8, Carbon
  • £19.99
  • RRP £35.99
  • Saving you £44

Deda Elementi Carbon Headset Spacers (10 Pack)Finish off your bike's cockpit in style with these Deda Elementi headset spacers, which are constructed from 3K high modulus carbon fibre. This pack of 10 will help you to obtain the perfect stem/bar height.Features:  Material: 3K high modulus Carbon Fibre  Compatibility: For 1 1/8” headset (fork steerer outside diameter 28.6 mm)  Outside Diameter: 32.0mm  Inside Diameter: 28.6mmBuy Deda Elementi Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Deda Elementi Carbon Headset Spacers (10 Pack) - 10mm 1"1/8, Carbon
  • £19.99
  • RRP £35.99
  • Saving you £44

Deda Elementi Carbon Headset Spacers (10 Pack)Finish off your bike's cockpit in style with these Deda Elementi headset spacers, which are constructed from 3K high modulus carbon fibre. This pack of 10 will help you to obtain the perfect stem/bar height.Features:  Material: 3K high modulus Carbon Fibre  Compatibility: For 1 1/8” headset (fork steerer outside diameter 28.6 mm)  Outside Diameter: 32.0mm  Inside Diameter: 28.6mmBuy Deda Elementi Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Bottom Headset Cup - Copper - EX34-30 - B1}, Copper
  • £19.99
  • RRP £24.99
  • Saving you £20

Nukeproof Horizon Bottom Headset CupNukeproof's headsets feature titanium-coated race bearings with stainless steel balls. The titanium coating has been applied using a method called 'Physical Vapour Deposition,' (PVD) which helps to improve durability and overall structure and density of the bearings. Incredibly fine, this coating is only 0.000118” thick and won't be damaged with wear or tear or corrode, thanks to the molecular bond from the PVD method. Whatsmore the race bearings have been ABEC 5 certified, making it the ideal addition.These bearings have been designed for use in the harshest weathers and have gone 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 headsets so you can be reassured your purchase will be a good one. All models feature a super tough black hard anodised finish, with laser-etched graphics.Click here to view and download our Nukeproof Headset Technical ManualFeatures:  Headset Type: Specific Bottom Cup  Bearings: Replaceable, angular contact type  Graphics: Laser-etched  Crown Race: Split Alloy  Finish: Hard Anodised  Options: Internal and external  Includes: Crown race, top cap and bolt supplied (Reducer crown race for 1.5" 1 1/8" sold separately)                                                                                                                                  Model Headtube Internal Diameter Steerer Black 1.1/8" EX34-30 - B1 34mm 1 1/8" Black 1.1/8" EX44-30 - B5 44mm 1.5" Black 1.5" EX49-40 - B7 49mm 1.5" Black 1.5" ZS56-40 - B8 56mm 1.5"  Buy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Bottom Headset Cup - Blue - EX49-40 - B7}, Blue
  • £19.99
  • RRP £24.99
  • Saving you £20

Nukeproof Horizon Bottom Headset CupNukeproof's headsets feature titanium-coated race bearings with stainless steel balls. The titanium coating has been applied using a method called 'Physical Vapour Deposition,' (PVD) which helps to improve durability and overall structure and density of the bearings. Incredibly fine, this coating is only 0.000118” thick and won't be damaged with wear or tear or corrode, thanks to the molecular bond from the PVD method. Whatsmore the race bearings have been ABEC 5 certified, making it the ideal addition.These bearings have been designed for use in the harshest weathers and have gone 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 headsets so you can be reassured your purchase will be a good one. All models feature a super tough black hard anodised finish, with laser-etched graphics.Click here to view and download our Nukeproof Headset Technical ManualFeatures:  Headset Type: Specific Bottom Cup  Bearings: Replaceable, angular contact type  Graphics: Laser-etched  Crown Race: Split Alloy  Finish: Hard Anodised  Options: Internal and external  Includes: Crown race, top cap and bolt supplied (Reducer crown race for 1.5" 1 1/8" sold separately)                                                                                                                                  Model Headtube Internal Diameter Steerer Black 1.1/8" EX34-30 - B1 34mm 1 1/8" Black 1.1/8" EX44-30 - B5 44mm 1.5" Black 1.5" EX49-40 - B7 49mm 1.5" Black 1.5" ZS56-40 - B8 56mm 1.5"  Buy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Bottom Headset Cup - Copper - EX49-40 - B7}, Copper
  • £19.99
  • RRP £24.99
  • Saving you £20

Nukeproof Horizon Bottom Headset CupNukeproof's headsets feature titanium-coated race bearings with stainless steel balls. The titanium coating has been applied using a method called 'Physical Vapour Deposition,' (PVD) which helps to improve durability and overall structure and density of the bearings. Incredibly fine, this coating is only 0.000118” thick and won't be damaged with wear or tear or corrode, thanks to the molecular bond from the PVD method. Whatsmore the race bearings have been ABEC 5 certified, making it the ideal addition.These bearings have been designed for use in the harshest weathers and have gone 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 headsets so you can be reassured your purchase will be a good one. All models feature a super tough black hard anodised finish, with laser-etched graphics.Click here to view and download our Nukeproof Headset Technical ManualFeatures:  Headset Type: Specific Bottom Cup  Bearings: Replaceable, angular contact type  Graphics: Laser-etched  Crown Race: Split Alloy  Finish: Hard Anodised  Options: Internal and external  Includes: Crown race, top cap and bolt supplied (Reducer crown race for 1.5" 1 1/8" sold separately)                                                                                                                                  Model Headtube Internal Diameter Steerer Black 1.1/8" EX34-30 - B1 34mm 1 1/8" Black 1.1/8" EX44-30 - B5 44mm 1.5" Black 1.5" EX49-40 - B7 49mm 1.5" Black 1.5" ZS56-40 - B8 56mm 1.5"  Buy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Nukeproof Horizon Bottom Headset Cup - Red - EX49-40 - B7}, Red
  • £19.99
  • RRP £24.99
  • Saving you £20

Nukeproof Horizon Bottom Headset CupNukeproof's headsets feature titanium-coated race bearings with stainless steel balls. The titanium coating has been applied using a method called 'Physical Vapour Deposition,' (PVD) which helps to improve durability and overall structure and density of the bearings. Incredibly fine, this coating is only 0.000118” thick and won't be damaged with wear or tear or corrode, thanks to the molecular bond from the PVD method. Whatsmore the race bearings have been ABEC 5 certified, making it the ideal addition.These bearings have been designed for use in the harshest weathers and have gone 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 headsets so you can be reassured your purchase will be a good one. All models feature a super tough black hard anodised finish, with laser-etched graphics.Click here to view and download our Nukeproof Headset Technical ManualFeatures:  Headset Type: Specific Bottom Cup  Bearings: Replaceable, angular contact type  Graphics: Laser-etched  Crown Race: Split Alloy  Finish: Hard Anodised  Options: Internal and external  Includes: Crown race, top cap and bolt supplied (Reducer crown race for 1.5" 1 1/8" sold separately)                                                                                                                                  Model Headtube Internal Diameter Steerer Black 1.1/8" EX34-30 - B1 34mm 1 1/8" Black 1.1/8" EX44-30 - B5 44mm 1.5" Black 1.5" EX49-40 - B7 49mm 1.5" Black 1.5" ZS56-40 - B8 56mm 1.5"  Buy Nukeproof Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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