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
£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.
£7.99  
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
£10.97  
Shimano Tourney Tx55 6/7 Speed Rear Derailleur With Mounting BracketShimano Tourney TX55 6/7 Speed Rear Derailleur With Mounting Bracket. Running a 6 or 7 speed set up on your touring bike but need a new direct mount derailleur, look no futher than Shimano's TX55 Tourney derailleur. The TX55 6 / 7-speed rear der...
£13.99  
Cube Replaceable Derailleur Hanger 123Cube Replaceable Derailleur Hanger 123. The Cube replacement derailleur hanger is designed to get you back on the bike as soon as possible after your original does its job and saves your frame.  Fitment: 2013: Comp Series, Limited Series, Reaction, ...
£13.99  
Cube Replaceable Derailleur Hanger 123Cube Replaceable Derailleur Hanger 123. The Cube replacement derailleur hanger is designed to get you back on the bike as soon as possible after your original does its job and saves your frame.  Fitment: 2013: Comp Series, Limited Series, Reaction, ...
£16.67  
Shimano Fd-3503 Sora 9-speed Front Derailleur - Triple Braze-onShimano FD-3503 Sora 9-Speed Front Derailleur - Triple Braze-On. Sora: The Shimano Sora 9-speed triple front derailleur is excellent for riders who are taking their first steps into road cycling or for riders who appreciate touring. The extra wide pi...
£17.99  
Wheels Manufacturing Replaceable Derailleur Hanger 120Wheels Manufacturing Replaceable Derailleur Hanger 120. The replaceable derailleur hanger from Wheels Manufacturing is designed to get you out of those sticky situations when your original hanger gives up the ghost. To find the ideal replacement hang...
£18.00  
Shimano Claris Rd-2400 8-speed Rear Derailleur Short Cage SsShimano Claris RD-2400 8-Speed Rear Derailleur Short Cage SS. Claris: Claris derailleurs feature an advanced light action for low-friction shifting up or down the block offering reliable and durable performance. Increased rigidity and precise gear sh...
£18.00  
Shimano Claris Rd-2400 8-speed Rear Derailleur Short Cage SsShimano Claris RD-2400 8-Speed Rear Derailleur Short Cage SS. Claris: Claris derailleurs feature an advanced light action for low-friction shifting up or down the block offering reliable and durable performance. Increased rigidity and precise gear sh...
£18.00  
Shimano Shimano Sora Rd-3500 9-speed Rear Derailleur Short Cage SsShimano Shimano Sora RD-3500 9-Speed Rear Derailleur Short Cage SS. Sora: Sora derailleurs feature an advanced light action for low-friction shifting up or down the block offering reliable and durable performance. A wide link design for increased rig...
£18.00  
Shimano Shimano Sora Rd-3500 9-speed Rear Derailleur Short Cage SsShimano Shimano Sora RD-3500 9-Speed Rear Derailleur Short Cage SS. Sora: Sora derailleurs feature an advanced light action for low-friction shifting up or down the block offering reliable and durable performance. A wide link design for increased rig...
£18.74  
Shimano Fd-m675 Slx 10-speed Front Derailleur - Double Top Swing - Dual-pullShimano FD-M675 SLX 10-Speed Front Derailleur - Double Top Swing - Dual-Pull. SLX: With Shimano SLX taking the mantle as the mid range mountain bike componentry to go to,  you can expect quality and performance at a price that will leave you grinnin...
£18.74  
Shimano Fd-m675-e2 Slx 10-speed Front Derailleur - Double Dual-pull, E-typeShimano FD-M675-E2 SLX 10-Speed Front Derailleur - Double Dual-Pull, E-Type. SLX: With Shimano SLX taking the mantle as the mid range mountain bike componentry to go to,  you can expect quality and performance at a price that will leave you grinning...
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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.