Bike Derailleurs

There are two types of derailleurs: front derailleurs and rear derailleurs. They are a mechanism that works with your shifter to move your bike chain up and down to change gears. Good working derailleurs will make your bike feel smoother and help you shift fast and accurate gears. We sell a range of derailleurs including Shimano derailleurs and SRAM derailleurs.

Derailleurs are as important as bike chains for the longevity of your drivetrain (which consists of pedals, cranks, chain-rings, chain, cassette and derailleurs that push the bike forwards) as they play an important role in helping you change your bike gears.

Whether you’re looking for mountain bike derailleurs designed to take a few knocks from the uneven terrain and work in mud, rain and grit or road bike derailleurs that can work smoothly under pressure, we have you covered.

Halfords sell both front and rear derailleurs for road bikes and mountain bikes available in 7 to 12 speed from top brands like the road cycling specialists Campagnolo.

If it’s your first time adjusting a derailleur, check out our how to adjust the rear derailleur guide for guidance and browse through our bike parts page to shop other drivetrain tools for your bike.