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Trax TR.1 Rigid Mens Mountain Bike - 19"
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Carrera Vengeance Mountain Bike 2011/2012 - Large 20"
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Raleigh Altare Hybrid Bike - 19" (1) £149.99 New Raleigh bikes from only £149.99 Reserve or Buy
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VooDoo Hoodoo Mountain Bike 2011/2012 - 18"
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Carrera Crossfire 2 Hybrid Bike 2011/2012 - Large 19"
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Hope Stealth Tech M4 Evo Braided Brakes
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Garmin Edge 200 GPS - Enabled Cycle Computer
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Bellelli Child Bike Seat
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Shimano XT 6 Bolt Disc Rotor 160mm
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Halfords Semi-Slick Bike Tyre - 27" x 1 1/4"
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Halfords ATB Tread Bike Tyre - 24" x 1.75"
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Nalini Mens Bianchi World Champion Long Sleeve Cycling Jersey
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Oakley Fast Jacket XL Sunglasses
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Northwave 2013 Drifter GTX Shoes
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TomTom XXL Western Europe Classic Sat Nav - UK, ROI & WE
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TomTom Start 25M Sat Nav - UK & ROI
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Garmin Nuvi 50LM Sat Nav - UK, ROI & Full Europe
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Garmin Nuvi 50 Sat Nav - UK, ROI & Full Europe
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V-Zon 7011 - 7" Clam Shell Portable DVD Player
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Parrot MKi9200 Bluetooth Handsfree Kit
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Sony MEXBT3900U CD/MP3 Player
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Autoleads 5 metre RCA Phono OFC Lead PC1-150
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Halfords Professional 7 Drawer Ball-Bearing Chest
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Halfords Battery Top-Up Water 5L
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Mobil Super 1000 X1 15W/40 Oil 5L
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Halfords Car Aerial Replacement Mast
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Halfords Black Flexible Rubber Car Aerial
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Ripspeed Car Seat Covers Full Set - Grey
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Halfords Carpet & Rubber Car Mats - Grey
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Aventura 4 Man Tunnel Tent
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Halfords 4 Man Tent Pack
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Halfords Single Flocked Airbed
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Halfords 40 Litre Mains and 12V Electric Coolbox
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Halfords Bright Spark Camping Gas
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Halfords Folding Picnic Table
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Thule Fitting Kit 4016
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Thule Fitting Kit 1356
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Exodus 470L Roof Box Grey
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Halfords 40 Litre Mains and 12V Electric Coolbox
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Halfords AA Batteries 12 Pack
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Halfords AAA Batteries 12 Pack
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Diono Bag It Disposable Bags
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Halfords Child Booster Seat Red/Black
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Maxi-Cosi Priori XP Child Car Seat Black Reflection
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Halfords Child Booster Seat Blue/Grey
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Skip Hop Zoopack Backpack Zebra
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Graco Junior Plus High Back Booster Seat Cherry Drop
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£35.00
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Bike Derailleurs
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- Bike Parts & Accessories
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The Campagnolo Chorus 10X Rear Mechs optimises the ultimate team of light weight and ultimate performance, including a more durable design to last year on year of solid use.
FREE Buy online and collect in-store in 4 working days
FREE Delivery on all orders over £30 within 4 working days -
The Shimano 9 speed RD3400GS rear derailleur has an improved surface treatment and a wide link design for greater stiffness and precise shifting
FREE Buy online and collect in-store in 4 working days
FREE Delivery on all orders over £30 within 4 working days -
The Campagnolo Xenon 10x Rear Mech is available in short and medium cages depending on which drivetrain it is going to be used with.
FREE Buy online and collect in-store in 4 working days
FREE Delivery on all orders over £30 within 4 working days -
The Shimano Tourney RD-TX55 Rear Derailleur- 6/7 Speed is a consistently performing product, which is designed to enhance the gear shifting process.
FREE Buy online before 3pm and collect in-store from 1pm tomorrow
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm -
Cat. code: 537441The Shimano 105 FD-5700 10-Speed Front Derailleur is lightweight and durable for enhanced longevity and seamless shifting performance.
FREE Buy online before 3pm and collect in-store from 1pm tomorrow
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm -
The Shimano Tourney RD-TX35 Rear Derailleur- 6/7 Speed has been produced to provide exemplary gear shifting and longevity, for sustainable high performance.
Not available for collection in store
Not available for delivery -
Cat. code: 307371The Shimano Deore RD-M531 9 Speed Rear Mech is a wide link top normal Deore derailleur.
FREE Reserve & Collect in-store in only an hour
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm -
Cat. code: 932285The Shimano TX31 Tourney rear mech uses SIS (Shimano index system) technology to deliver brilliant shifting.
FREE Reserve & Collect in-store in only an hour
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm -
Cat. code: 571986The Shimano Deore RD-M771 XT SGS Rear Derailleur is cleverly crafted to offer an excellent product which is designed to ensure a smooth and efficient drivetrain.
FREE Buy online before 3pm and collect in-store from 1pm tomorrow
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm -
Cat. code: 538670The Shimano RD-M810 Saint Shadow Black Rear Derailleur features a super low profile design with a sleek skid plate surface to protect the derailleur in extreme situations.
FREE Buy online before 3pm and collect in-store from 1pm tomorrow
FREE Delivery on all orders over £30 within 4 working days£5.99 Next day delivery available if ordered by 3pm
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Bike Derailleurs at Halfords
If you need a new bike derailleur then Halfords.com can help - we've got a wide range of both front and rear derailleurs available for you to browse online today.
Whether you're after a mountain bike derailleur or a road bike derailleur, we should have something for you in our selection. We have top names like SRAM and Shimano on offer, so take the time to choose one that's compatible with your bicycle.
Once you've chosen the part you need, pop it in the online basket and head to the checkout. Here you can opt whether to reserve online and collect in-store, or for home delivery.
Don't forget Halfords offers a low-cost fitting service on bike derailleurs plus a large range of other bike parts and cycle accessories, so you don't have to do the job yourself. That's helpful, that's Halfords - order now.












