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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£1.29  
Shim For Front Derailleur Plastic BlackShim For Front Derailleur Plastic Black
£5.00  
Sram Pitstop 1.1mm Derailleur Inner Cable For Tandem/ttThe SRAM PitStop 1.1mm Derailleur Inner Cable for Tandem/TT is a strong reliable inner cable. Comes 3100mm long and is suitable for applications requiring long cables such as Tandem or TT bikes.
£5.99  
Adie Stabiliser Derailleur KitAdie Stabiliser Derailleur Kit; this enables a bike with derailleur gears to be fitted with stabilisers. Often a moment a child learns to ride a bike they want derailleur gears. This kit saves the parents buying two bikes.
£6.00  
Swobo Crosby Derailleur HangerSwobo Crosby Derailleur Hanger. Mech hangers are designed to snap to save your frame from failure so if you have snapped the hanger on your Swobo Crosby worry no more as here is a replacement for it.
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Ex Display)Brompton Derailleur Gear Cable Only M-Type LWB (Ex Display). This is an ex display gear cable which has some minor cosmetic marks. The original packaging is also missing. Ex-Display & Soiled parts, accessories and clothing are items that have imperfe...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Ex Display)Brompton Derailleur Gear Cable Only M-Type LWB (Ex Display). This is an ex display gear cable which has some minor cosmetic marks. The original packaging is also missing. Ex-Display & Soiled parts, accessories and clothing are items that have imperfe...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Ex Display)Brompton Derailleur Gear Cable Only M-Type LWB (Ex Display). This is an ex display gear cable which has some minor cosmetic marks. The original packaging is also missing. Ex-Display & Soiled parts, accessories and clothing are items that have imperfe...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Ex Display)Brompton Derailleur Gear Cable Only M-Type LWB (Ex Display). This is an ex display gear cable which has some minor cosmetic marks. The original packaging is also missing. Ex-Display & Soiled parts, accessories and clothing are items that have imperfe...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Soiled)Brompton Derailleur Gear Cable Only M-Type LWB (Soiled). This item is ex-display, ex-demo or soiled. Soiled items are items that have imperfections or have suffered wear during the course of sale here at Evans Cycles. They include ex-display, ex-demo...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Soiled)Brompton Derailleur Gear Cable Only M-Type LWB (Soiled). This item is ex-display, ex-demo or soiled. Soiled items are items that have imperfections or have suffered wear during the course of sale here at Evans Cycles. They include ex-display, ex-demo...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Soiled)Brompton Derailleur Gear Cable Only M-Type LWB (Soiled). This item is ex-display, ex-demo or soiled. Soiled items are items that have imperfections or have suffered wear during the course of sale here at Evans Cycles. They include ex-display, ex-demo...
£7.00  
Brompton Derailleur Gear Cable Only M-type Lwb (Soiled)Brompton Derailleur Gear Cable Only M-Type LWB (Soiled). This item is ex-display, ex-demo or soiled. Soiled items are items that have imperfections or have suffered wear during the course of sale here at Evans Cycles. They include ex-display, ex-demo...
£7.99  
Sram X3 7/8 Speed Rear Derailleur / Black / Medium CageSRAM X3 7/8 Speed Rear Derailleur / Black / Medium Cage
£7.99  
Sram X3 7/8 Speed Rear Derailleur / Black / Medium CageSRAM X3 7/8 Speed Rear Derailleur / Black / Medium Cage
£7.99  
Sram X4 And Sx4 Rear Derailleur Jockey WheelsThe SRAM X4 and SX4 Rear Derailleur Jockey Wheels are a genuine SRAM replacement part for X4 and SX4 mech mechs.
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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.