Derailleurs

If you're searching for mountain bike derailleurs then look no further.

www.mycycleshop.co.uk has what we believe to be probably the largest selection of bike derailleurs in the UK. looking for the products of your choice could not be easier, by using our search facility, you can quickly find them and even compare prices and similar models (where available). You can narrow it down by typing in a specific brand name, for instance Shimano bike derailleurs. It is then a simple matter of linking directly through to the relevant retailer to make your purchase.

We have teamed up with the most respected cycling retailers in Britain today so that you not only have fantastic choice but you can be safe in the knowledge that you are receiving only high quality products and great service too!

Of course, you may not just be looking for road or mountain bike derailleurs and so you will find here thousands of great cycling products all in one fantastic place!

With so much choice, value and excellent service, why go anywhere else?

Make www.mycycleshop.co.uk YOUR cycle shop.

Enjoy!

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£19.49  
Shimano R443 Triple 8/9 Speed Front DerailleurShimano R443 Triple 8/9 Speed Front Derailleur: Part of Shimano's component groupset designed for road bikes featuring flat handlebars. Wide link derailleur design for rigidity and precise, accurate shifts every time Maximum flexibility - version...
£19.79  
Shimano Deore M610 Triple 10-speed E-type Front DerailleurThis is the wide link design Shimano Deore M610 Triple 10-Speed E-Type Front Derailleur. It is a top swing, dual pull, wide pivot link design for greater torsional rigidity which improves shifting response and service life. The E-tyre mounting system...
£19.79  
Shimano Deore M610 Triple 10-speed Multi Fit Front DerailleurThis is the wide link design Shimano Deore M610 Triple 10-Speed Multi Fit Front Derailleur. It is a top swing, dual pull, wide pivot link design for greater torsional rigidity which improves shifting response and service life. The Multi Fit mounting ...
£20.49  
Shimano Xt M785 10 Speed Double Front DerailleurShimano XT M785 10 Speed Double Front Derailleur: Lightweight front E-Type bottom bracket mount and Top Swing Dyna-Sys 10-speed double MTB derailleur for smooth gear changes. Both Dual Pull design for use with top or bottom cable routing. The regular...
£20.99  
Shimano Fd-m771 Xt Front DerailleurShimano FD-M771 XT Front Derailleur: The XT direct fit front derailleur offers high quality 9-speed performance and reliability for demanding mountain bikers. Dual Pull design for use with top or bottom cable routing Direct frame fit for easy and acc...
£22.11  
Shimano R453 Triple 9 Speed Front DerailleurShimano R453 Triple 9 Speed Front Derailleur: 9 Speed Front Mech designed for triple chainsets ans is part of Shimano's component groupset designed for road bikes featuring flat handlebars. Wide link derailleur design for rigidity and precise, ac...
£22.49  
Shimano Fd-m671 Slx 10-speed Triple Front Derailleur Dual-pull Direct-fitTough aggressive and light weight All-Mountain direct fit front derailleur Dual Pull design for use with top or bottom cable routing Direct frame fit for easy and accurate installation giving perfect alignment Wider pivot link increases tors...
£24.29  
Shimano Fd-m781 Xt 10spd Triple Front Derailleur Direct-fit Dual-pull SilverLightweight front Direct mount Dyna-Sys 10-speed triple MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingReinforced light weight chain guide adds rigidity and improved responseWider pivot link increases t...
£24.29  
Shimano Fd-m785 Xt 10spd Double Front Derailleur E-type For 38-40t Dual-pullLightweight front E-Type bottom bracket mount Dyna-Sys 10-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingReinforced light weight chain guide adds rigidity and improved responseWider pivot l...
£24.29  
Shimano Fd-m785 Xt Double Front Derailleur Top Swing Dual-pullLightweight front top swing Dyna-Sys 10-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingThe regular Multi-fit band clamp assures easy and secure fit on any frame type with adapters to suit s...
£24.29  
Shimano Fd-m786 Xt 10-speed Double Front Derailleur Conventional Swing BlackLightweight front Conventional swing Dyna-Sys 10-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingThe regular Multi-fit band clamp assures easy and secure fit on any frame type with adapters ...
£24.29  
Shimano Fd-m786 Xt 10spd Double Front Derailleur Direct-fit Dual-pull BlkLightweight front Direct mount Dyna-Sys 10-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingReinforced light weight chain guide adds rigidity and improved responseWider pivot link increases t...
£24.29  
Shimano Fdm786 Xt 10spd Dbl Front Derailleur Conventional Swing SilverLightweight front Conventional swing Dyna-Sys 10-speed double MTB derailleur for smooth gear changesDual Pull design for use with top or bottom cable routingThe regular Multi-fit band clamp assures easy and secure fit on any frame type with adapters ...
£24.91  
Shimano M667 Slx Front Derailleur For Double Conventional Swing For 68 / 73 Mm BbDouble specific SLX mountain bike front derailleur designed to perform with a 36 x 22T compact drive cranksetDouble specific compact front derailleur developed to track the radius of a 36 tooth chainring giving much improved chain pick upWider and lo...
£25.19  
Shimano Fd-t781 Xt 10-speed Triple Front Derailleur For 63-66 Deg Conventional SwingLightweight front Conventional swing 10-speed trekking derailleur for smooth gear changes Dual Pull design for use with top or bottom cable routing The regular Multi-fit band clamp assures easy and secure fit on any frame type withadapters to s...
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Derailleur gears are a transmission system found on bikes. They consist of the chain, sprockets of varying sizes and the mechanism which moves the chain across the sprockets.

Most mountain bike derailleurs include a moveable chain guide which is controlled by a cable attached to a shifter. The rider shifts the gear whilst pedalling and this in turn moves the chain guide side to side which "derails" the chain onto the different sprockets.

Most road bikes have a 10 or 11 gear rear cassette. Mountain bikes generally have three front chainrings compared with road bikes which have two or three.

Bike derailleurs need the chain to be moving whilst shifting. This means of course that the rider must be pedalling to achieve this. More recently, however has been the development of freewheel in the crankset. This allows the chain to move even when the rider isn't pedalling.

Road and mountain bike derailleurs work best when the chain is aligned with the sprockets correctly. There is a possibility thet the chain will shift past the small inner chainring causing misshifts. A solution to this problem would be to install a simple chain deflector. These clamp either around the seat tube, under the front derailleur and to the front derailleur mount.