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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Chain Reaction UK have 298 Prime products listed

Prime R010 BlackEdition Front Hub (Rim Brake) - 20H}, Black
  • £38.49
  • RRP £74.99
  • Saving you £49

Prime R010 BlackEdition Front Hub (Rim Brake)Taking its place at the top-end of Prime's hub range, the R010 BlackEdition is a superb fixture for your CenterLock disc front wheel build. Constructed using a superlight forged alloy for sturdiness and longevity, this hard-wearing hub has also been CNC-machined to reduce weight without compromising its strength. Long-life, premium sealed cartridge bearings ensure minimal friction rotation, maximum efficiency and low-maintenance as you push every ride hard and heartily.Features: Material: Superlight forged & CNC machined 7075 alloy hub body Spoke Type: Straightpull PCD: 31.5mm, Flange to flange 80.4mm, Spoke Gauge 14 Hub Bearings: 2x 699 Premium sealed cartridge bearings Axle: 100mm x 9mm QR Hole Count: 20 Weight: 74gBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Primavera 1-1-8"-1.5" Integrated Headset - Black - 3mm, Black
  • £39.99

Prime Primavera 1-1/8"-1.5" Integrated HeadsetDesigned to provide you with the ultimate in steering performance, this headset features Ti Coated Races and Grade 10 Stainless Steel balls. Often overlooked and neglected, the headset is an essential component of your bike. Upgrade your ride with the Primavera Carbon Headset.The titanium nitrite coated races in the Primavera 1-1/8"-1.5" Integrated Headset roll smoothly and won't rust, while the angular contact bearings provide stability and allow for adjustability.We wanted the headset to run smoothly and last for many miles in all conditions, so the bearings are sealed tight against the elements.The looks match the performance thanks to a Prime branded carbon top cap and cover. We didn't hold back on the crown race either - it is CNC'd from 7075 alloy, which provides an improved contact point for the headset.And, if you want to slam your stem like the pros, select our short option, which features a 2.4mm top cover.Features: Steerer Type: Tapered 1-1/8" to 1.5" Top Cap Material: Carbon Top Cover Material: Carbon Bearing Material: Titanium Race with Steel Bearing Use: Road Upper Bearing: IS41.8/28.6, 6.5mm H x 41.8mm OD x 45x45deg Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg Stack Height: 8.9mm (Medium option) / 2.9 mm (short option) (without Crown Race) Top Cover Height: 8.2mm (Medium option) / 2.4mm (short option) Weight: TBCBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Primavera 1-1-8"-1.5" Integrated Headset - Black - 8mm, Black
  • £39.99

Prime Primavera 1-1/8"-1.5" Integrated HeadsetDesigned to provide you with the ultimate in steering performance, this headset features Ti Coated Races and Grade 10 Stainless Steel balls. Often overlooked and neglected, the headset is an essential component of your bike. Upgrade your ride with the Primavera Carbon Headset.The titanium nitrite coated races in the Primavera 1-1/8"-1.5" Integrated Headset roll smoothly and won't rust, while the angular contact bearings provide stability and allow for adjustability.We wanted the headset to run smoothly and last for many miles in all conditions, so the bearings are sealed tight against the elements.The looks match the performance thanks to a Prime branded carbon top cap and cover. We didn't hold back on the crown race either - it is CNC'd from 7075 alloy, which provides an improved contact point for the headset.And, if you want to slam your stem like the pros, select our short option, which features a 2.4mm top cover.Features: Steerer Type: Tapered 1-1/8" to 1.5" Top Cap Material: Carbon Top Cover Material: Carbon Bearing Material: Titanium Race with Steel Bearing Use: Road Upper Bearing: IS41.8/28.6, 6.5mm H x 41.8mm OD x 45x45deg Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg Stack Height: 8.9mm (Medium option) / 2.9 mm (short option) (without Crown Race) Top Cover Height: 8.2mm (Medium option) / 2.4mm (short option) Weight: TBCBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Handlebar and Bar Tape Bundle - Black - 31.8mm, Black
  • £44.99
  • RRP £79.99
  • Saving you £44

Prime Doyenne Handlebar and Tape BundleThis aero handlebar features a tough 6061 aluminium construction with a traditional drop bar design for maximum control. Allowing you the freedom to change your riding position, this stunning version is equipped with a 75mm reach and a 125mm drop. This means you can take up your best position when riding with your head down or sitting upright. Optimised for use with Di2 junction boxes, this stunning component offers a tidier and more aerodynamic finish.Prime Race Handlebar TapeThis handlebar tape features Prime's Super Anti-Slippery Technology, which gives you exceptional grip even during wet riding conditions. Thanks to its 2.5mm thick design, it also helps to eliminate road vibrations for an extra smooth ride. Coming complete with finishing strips and two anodised alloy screw-in bar end plugs, this model is a great choice of upgrade for riders that want reliable performance on race day.Features: Material: 6061 Aluminium Use: Road Drop: 125mm Reach: 75mm Bar Diameter: 31.8mm Di2 Compatible: Yes Flare: 4° Includes: Prime Race Handlebar Tape, 2x Rolls, 2x Finishing Strips, 2x anodised Alloy screw in bar end plug Weight: 370g (420mm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime RD020 Disc Road Front Hub - Grey - 24h, Grey
  • £44.99
  • RRP £59.99
  • Saving you £25

Prime RD020 Disc Road Front HubThis Prime RD020 disc brake front road hub features a superlight forged alloy 7075 hub body that has been CNC machined to further reduce weight without compromising structural integrity. Our hubs run on premium Japanese sealed cartridge bearings for ultra low friction and superior bearing life. Material: Superlight Forged & CNC machined 7075 alloy hub body Spoke Type: J bend Flange to flange 62mm, Flange thickness 3.3mm, disc side offset 6mm, Spoke Gauge 14 Bearings: Premium Japanese sealed cartridge bearings x2 3 in 1 Axle: 100mm x 9mm QR Hole Count: 24 Weight: 150g Buy Prime Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime SR Freehub Body - XDR - Black - 12 Speed}, Black
  • £44.99
  • RRP £49.99
  • Saving you £10

Prime SR Freehub Body - XDRThe SR Freehub Body - Campagnolo from Prime is a replacement star ratchet free-hub body that is compatible with SRAM XDR 11/12 Speed cassettes and Prime SR1/SR2/SR1D/SR2D Hubs. Features: Replacement star ratchet free-hub body Cassette Compatibility: SRAM XDR 11/12 Speed Prime Hub Compatibility: SR1/SR2/SR1D/SR2D Hubs Genuine Prime replacement partsBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime SR Freehub Body - Campagnolo - Black - 9/10/11 Speed}, Black
  • £44.99
  • RRP £49.99
  • Saving you £10

Prime SR Freehub Body - CampagnoloThe SR Freehub Body - Campagnolo from Prime is a replacement star ratchet free-hub body that is compatible with Campagnolo 9/10/11 Speed cassettes and Prime SR1/SR2/SR1D/SR2D Hubs. Features: Replacement star ratchet free-hub body Cassette Compatibility: Campagnolo 9/10/11 Speed Prime Hub Compatibility: SR1/SR2/SR1D/SR2D Hubs Genuine Prime replacement partsBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime SR Freehub Body - Shimano - Black - 9/10/11 Speed}, Black
  • £44.99
  • RRP £49.99
  • Saving you £10

Prime SR Freehub Body - ShimanoThe SR Freehub Body - Campagnolo from Prime is a replacement star ratchet free-hub body that is compatible with Shimano/SRAM HG 9/10/11 Speed cassettes and Prime SR1/SR2/SR1D/SR2D Hubs. Features: Replacement star ratchet free-hub body Cassette Compatibility: Shimano/SRAM HG 9/10/11 Speed Prime Hub Compatibility: SR1/SR2/SR1D/SR2D Hubs Genuine Prime replacement partsBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime RD020 Rear Road Disc Hub - Grey - 24h, Grey
  • £48.99
  • RRP £99.99
  • Saving you £51

Prime RD020 Rear Road Disc HubPrime RD020 disc brake rear road hub features a superlight forged alloy 7075 hub body that has been CNC machined to reduce weight without compromising structural integrity. The RD020 features 4 pawls and 26-point engagement, which ensures superfast, pick up for increased acceleration and positive engagement.Our hubs run on premium Japanese sealed cartridge bearings for ultra low friction and superior bearing life comprising of two in the hub body and two in the freehub body.The freehub body has a superlight alloy construction and features our ABG (Anti Bite Guard) technology where an integrated reinforced steel rib has been incorporated to eliminate damage from driving forces placed on individual sprockets.A grease port has also been added for home maintenance to further prolong bearing life and reduce service intervals. Material: Superlight Forged & CNC machined 7075 alloy hub body Spoke Type: J bend Brake Standard: Disc Brake, Centre Lock Bearings: Premium Japanese sealed cartridge bearings x 4 2 in 1 Axle: 135mm x QR Axle Adaptors Included: No Pawls: 4 Points of Engagement: 26 Freehub Body: Light weight alloy with ABG (Anti Bite Guard), Shimano/SRAM 9/10/11 speed Freehub Body Option: Campagnolo freehub body available for purchase separately Hole Count: 24 Weight: 275g Buy Prime Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store."

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Prime Orra Gravel Bike Handlebar - Black - 31.8mm, Black
  • £49.99

Prime Kanza Gravel Bike Handlebar This brilliant handlebar is designed for adventurous gravel rides as it gives you smooth and reliable steering performance. Equipped a rock-solid 6061 aluminium construction, this versatile warrior is perfect for guiding you across mixed terrain conditions. Engineered for maximum control, Prime has also kitted this model out with a 16° flared-drop which creates a wider, more stable platform for excellent handling on tricky descents. Lightweight Gravel HandlebarDeveloped to take you further than before, this mixed terrain conqueror weighs in at only 330g (420mm version). This means you can enjoy its tremendous strength without worrying about adding any unnecessary grams to your ride. Taking you from the city streets to the rocky forest pathways, its 31.8mm bar diameter adds another layer of durability to this already robust workhorse. Features: Material: 6061 Aluminium Use: Road, Gravel Diameter: 31.8mm Drop Flare: 16° Rise: 20mm Bar Drop: 125mm Bar Reach: 75mm Weight: 330g (420mm version)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Lightweight Alloy Road Handlebar - Black - 38cm}, Black
  • £49.99

Prime Doyenne Lightweight Alloy Road HandlebarWeighing in at only 214g (40cm option), this handlebar delivers an ideal balance of stiffness, strength and low weight. Manufactured using 7050 alloy and adorned with a sleek Black on Black finish the Doyenne Lightweight Handlebar will compliment even the most prestige road bike.7050 aluminium offers better stress corrosion, cracking resistance and corrosion resistance when compared with most other alloys used in handlebars, it's also stronger, and stiffer meaning every ounce of energy is transferred into forward propulsion.The Compact design with 125mm drop and 70mm reach combines for a super comfortable hand position to suit every rider.Features: Material: Triple-butted 7075 Aluminium Use: Road Drop: 125mm Reach: 70mm Compact design Measured Centre to Centre Bar End Di2 Junction Box Compatible Externally routed Weight: 214g (40cm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Lightweight Alloy Road Handlebar - Black - 42cm}, Black
  • £49.99

Prime Doyenne Lightweight Alloy Road HandlebarWeighing in at only 214g (40cm option), this handlebar delivers an ideal balance of stiffness, strength and low weight. Manufactured using 7050 alloy and adorned with a sleek Black on Black finish the Doyenne Lightweight Handlebar will compliment even the most prestige road bike.7050 aluminium offers better stress corrosion, cracking resistance and corrosion resistance when compared with most other alloys used in handlebars, it's also stronger, and stiffer meaning every ounce of energy is transferred into forward propulsion.The Compact design with 125mm drop and 70mm reach combines for a super comfortable hand position to suit every rider.Features: Material: Triple-butted 7075 Aluminium Use: Road Drop: 125mm Reach: 70mm Compact design Measured Centre to Centre Bar End Di2 Junction Box Compatible Externally routed Weight: 214g (40cm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Lightweight Alloy Road Handlebar - Black - 40cm}, Black
  • £49.99

Prime Doyenne Lightweight Alloy Road HandlebarWeighing in at only 214g (40cm option), this handlebar delivers an ideal balance of stiffness, strength and low weight. Manufactured using 7050 alloy and adorned with a sleek Black on Black finish the Doyenne Lightweight Handlebar will compliment even the most prestige road bike.7050 aluminium offers better stress corrosion, cracking resistance and corrosion resistance when compared with most other alloys used in handlebars, it's also stronger, and stiffer meaning every ounce of energy is transferred into forward propulsion.The Compact design with 125mm drop and 70mm reach combines for a super comfortable hand position to suit every rider.Features: Material: Triple-butted 7075 Aluminium Use: Road Drop: 125mm Reach: 70mm Compact design Measured Centre to Centre Bar End Di2 Junction Box Compatible Externally routed Weight: 214g (40cm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Lightweight Alloy Road Handlebar - Black - 44cm}, Black
  • £49.99

Prime Doyenne Lightweight Alloy Road HandlebarWeighing in at only 214g (40cm option), this handlebar delivers an ideal balance of stiffness, strength and low weight. Manufactured using 7050 alloy and adorned with a sleek Black on Black finish the Doyenne Lightweight Handlebar will compliment even the most prestige road bike.7050 aluminium offers better stress corrosion, cracking resistance and corrosion resistance when compared with most other alloys used in handlebars, it's also stronger, and stiffer meaning every ounce of energy is transferred into forward propulsion.The Compact design with 125mm drop and 70mm reach combines for a super comfortable hand position to suit every rider.Features: Material: Triple-butted 7075 Aluminium Use: Road Drop: 125mm Reach: 70mm Compact design Measured Centre to Centre Bar End Di2 Junction Box Compatible Externally routed Weight: 214g (40cm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime RD010 BlackEdition Rear Road Disc Hub - 24H}, Black
  • £49.99
  • RRP £99.99
  • Saving you £50

Prime RD010 BlackEdition Rear Road Disc HubA lightweight and reliable CenterLock rear hub for the pacy and powerful rider, this RD010 model is the pinnacle of Prime's range, using its CNC-machined build and four-pawl freehub to push you on to glory. The superlight alloy construction of this durable hub delivers a supportive and strong performance, with the freehub body also benefitting from the CNC process. Durable and Dependable, CNC-Machined Alloy Rear HubWith four pawls and 26 points of engagement, the freehub pushes you through challenging routes with superb acceleration and power. Prime's proprietary ABG (Anti Bite Guard) technology also adds protection to proceedings, where an integrated reinforced steel rib has been incorporated to eliminate damage from driving forces placed on individual sprockets. Easy to maintain thanks to the integrated grease port, the Prime RD010 BlackEdition Rear Hub gives a long-lasting and dependable performance, ride after ride. Features: Material: Superlight Forged & CNC machined 7075 alloy hub body Spoke Type: Straightpull PCD: 34/47mm, Flange to flange 68mm, drive side offset 6.3mm, Spoke Gauge 14 2 in 1 Axle: 130mm x QR with 142mm x 12mm thru-axle adaptors included Pawls: 4 Points of Engagement: 26 Hub Bearings: Rear: 2x 15267, Freehub: 2x 15267 Freehub Body: Lightweight alloy with ABG (Anti Bite Guard), Shimano/SRAM 9/10/11 speed XDR & Campagnolo freehub body available for purchase separately) Hole Count: 24 Weight: 233gBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime SR Freehub Body - Campagnolo 13 Speed - Black - 13 Speed}, Black
  • £49.99

Prime SR Freehub Body - Campagnolo 13 SpeedThe SR Freehub Body - Campagnolo from Prime is a replacement star ratchet free-hub body that is compatible with Campagnolo 13 Speed cassettes and Prime SR1/SR2/SR1D/SR2D Hubs. Features: Replacement star ratchet free-hub body Cassette Compatibility: Campagnolo 13 Speed Prime Hub Compatibility: SR1/SR2/SR1D/SR2D Hubs Genuine Prime replacement partsBuy Prime Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Lightweight Alloy Road Handlebar - Black - 36cm}, Black
  • £49.99

Prime Doyenne Lightweight Alloy Road HandlebarWeighing in at only 214g (40cm option), this handlebar delivers an ideal balance of stiffness, strength and low weight. Manufactured using 7050 alloy and adorned with a sleek Black on Black finish the Doyenne Lightweight Handlebar will compliment even the most prestige road bike.7050 aluminium offers better stress corrosion, cracking resistance and corrosion resistance when compared with most other alloys used in handlebars, it's also stronger, and stiffer meaning every ounce of energy is transferred into forward propulsion.The Compact design with 125mm drop and 70mm reach combines for a super comfortable hand position to suit every rider.Features: Material: Triple-butted 7075 Aluminium Use: Road Drop: 125mm Reach: 70mm Compact design Measured Centre to Centre Bar End Di2 Junction Box Compatible Externally routed Weight: 214g (40cm)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Mini TT Alloy Clip On Aero Bar - Black, Black
  • £54.99
  • RRP £59.99
  • Saving you £8

Prime Mini TT Alloy Clip On Aero BarKeeping you focused on the podium, this clip-on aerobar gives you compact, light and aerodynamic performance on your TT bike. It features a durable aluminium construction, which means that you'll benefit from its brilliant stiffness and cost-effectiveness. Kitted out with a bridge that connects its extensions together, this race-ready aerobar offers riders increased hand comfort alongside its arm pads. Features: Material: AL6061 Aluminium Use: Road, TT Type: Clip-on aerobar Max Length Max: 190mm Minimum Length: 160mm Armrest's R/L Adjustable: R: 30mm; L: 30mm Armrest's +/- Adjustable Angle: 15 degrees (+/- 7.5 degrees) Clamp: 31.8mm Weight: 407g (with pads)Buy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime PrimaXC MTB Handlebar 2022 - Black - 780mm, Black
  • £54.99
  • RRP £109.99
  • Saving you £50

Prime PrimaXC MTB HandlebarFine-tuned for precise steering performance, this versatile handlebar is ready for everything from competing in a cross country (XC) racing event to exploring new off-road routes on your mountain bike. Prime has kitted it out with a T800 unidirectional (UD) carbon construction, which gives it the best balance of stiffness and durability while keeping its overall weight to a minimum. Another highlight is its 3K weave on its bar ends to deliver additional strength to the end of the bars.Race Ready GeometryKeeping you comfortable and supported with every turn, this MTB handlebar is equipped with 9 degrees of backsweep, zero degrees upsweep and a 4.8mm rise to give a perfect flat top section on the bar. This combination provides increased comfort and smooth steering wherever your next ride takes you.Carbon Fibre XC HandlebarBenefitting from a 780mm width, this handlebar is also cuttable using the printed cut-down scale. Featuring increments that are printed on its body, you can easily cut the handlebar to suit your exact steering requirements and riding style if needed. Prime has also finished this model with a fibre painted grip and a stem clamping area for maximum security and precision as you travel across rough, mixed terrains at speed. Coming complete with external cable routing and weighing in at only 234g, the Prime PrimaXC MTB Handlebar is a great choice of upgrade for smooth and dependable steering without any unnecessary excess weight.- T800 unidirectional carbon with 3K weave on bar ends to give added strength to end of bars.- Fibre-painted grip and stem clamping area for improved grip.- 9 degrees back sweep.- 4.8mm rise to give perfect flat top section on bar.- 0 degrees upsweep.Features: Material: T800 Unidirectional Carbon with 3K weave on bar ends Use: Mountain Bike (MTB), Cross Country (XC) Clamping Bore: 31.8mm Width: 780mm (with cut down scale on bars) Cable Routing: External cable routing Backsweep: 9 degrees Upsweep: 0 degrees Rise: 4.8mm Fibre painted grip and stem clamping area Weight: 234gManufacturer's Part Number: PPXCMTBHB780CM Black 78cmx10mm 780mmBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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Prime Doyenne Shorty Saddle with Ti Rails 2023 - Black, Black
  • £54.99
  • RRP £59.99
  • Saving you £8

Prime Doyenne Shorty Saddle with Ti RailsDesigned in collaboration with Team Wiggle Spectra, this road bike saddle is engineered to keep you supported in all weather and surface conditions. Offering the best combination of stiffness, strength and lightweight performance, this model is equipped with a stiff polycarbonate shell and Ti alloy rails. Another highlight is its low-weight polyurethane (PU) foam padding and central cut-out, which reduces any pressure and fatigue from around your sit bones, allowing you to go the extra distance with all day comfort.Lightweight Road Bike Saddle with Prime Saddle IntegrationReady for long days on your favourite road routes, this premium saddle comes complete with Prime Saddle Integration (PSI). PSI allows you to clip PSI accessories into the saddle base to allow for sleek integration. As a result, you'll easily be able to bring any essentials with you on your travels. Weighing in at an impressively low weight, the Prime Doyenne Shorty Saddle with Ti Rails is a perfect choice of upgrade for increased comfort and reliability without adding any unnecessary excess grams to your road bike.Features: Cover Material: Tough water-resistant cover Shell Material: Polycarbonate Rails Material: Ti Alloy Padding Material: Lightweight Polyurethane (PU) padding Use: Road Size: 240x143mm (L x W) PSI Compatible Developed with Team Wiggle Spectra Unisex Weight: 235gBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.

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