Bike Derailleurs

Bike Derailleurs

The derailleur is a crucial component of your bike's drivetrain, responsible for moving the chain between gears in coordination with your shifter. This mechanism ensures smooth, quick, and precise gear changes, enhancing the overall riding experience.
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Shimano 827 GRX Di2, 12-Speed Shadow ES Rear Derailleur
Shimano
827 GRX Di2, 12-Speed Shadow ES Rear Derailleur
  • Fully Wireless
  • Dual Spring Chain Stabiliser
  • Crash Recovery Function
  • Removable Battery
£429.99
Shimano Ultegra R8000 11-Speed Rear Derailleur GS
Shimano
Ultegra R8000 11-Speed Rear Derailleur GS
£91.20
RRP £95.00
SRAM Force AXS E1 Front Derailleur
SRAM
Force AXS E1 Front Derailleur
  • SRAM Yaw Technology
  • Faster, more accurate front shifting
  • Auto trim function
  • AXS enabled
£240.00
Bestseller
Shimano Ultegra R8150 Di2 12-Speed Rear Derailleur
Shimano
Ultegra R8150 Di2 12-Speed Rear Derailleur
£380.00
Shimano Ultegra R8050 Di2 Front Derailleur E-Tube, Double, Braze-On
Shimano
Ultegra R8050 Di2 Front Derailleur E-Tube, Double, Braze-On
£208.80
RRP £215.00
SRAM Force AXS D2 12-Speed Max 36T Rear Derailleur
SRAM
Force AXS D2 12-Speed Max 36T Rear Derailleur
£267.26
RRP £322.00 Save 17%
Shimano Ultegra R8000 11-Speed Rear Derailleur SS
Shimano
Ultegra R8000 11-Speed Rear Derailleur SS
£69.99
RRP £90.00 Save 22%
SRAM Force AXS XPLR E1 Rear Derailleur
SRAM
Force AXS XPLR E1 Rear Derailleur
  • Built for gravel
  • Hangerless Interface and Full Mount attachment
  • Replaceable and rebuildable parts
£420.00
Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 36T
Shimano
GRX RD-RX820 12-Speed Rear Derailleur Max 36T
£114.00
RRP £120.00 Save 5%
SRAM Red AXS XPLR E1 Rear Derailleur Carbon Inner Cage
SRAM
Red AXS XPLR E1 Rear Derailleur Carbon Inner Cage
£56.00
RRP £62.00 Save 10%
Shimano GRX FD-RX820 12-Speed Double Front Derailleur
Shimano
GRX FD-RX820 12-Speed Double Front Derailleur
£52.00
RRP £55.00 Save 5%
Shimano GRX 815 Di2 Front Derailleur
Shimano
GRX 815 Di2 Front Derailleur
£209.00
RRP £220.00 Save 5%
Shimano GRX RD-RX820 12-Speed Rear Derailleur Max 45T
Shimano
GRX RD-RX820 12-Speed Rear Derailleur Max 45T
£103.00
RRP £120.00 Save 14%
SRAM Rival 1x XPLR Dub Wide E1 Chainset
SRAM
Rival 1x XPLR Dub Wide E1 Chainset
  • High-performance aluminium
  • DUB bottom bracket enhances durability and simplifies maintenance
  • SRAM X-SYNC wide-tooth, narrow-tooth chainring technology
£130.00
SRAM Red AXS XPLR E1 Rear Derailleur
SRAM
Red AXS XPLR E1 Rear Derailleur
£700.00
Shimano GRX 825 Di2 12-Speed Rear Derailleur
Shimano
GRX 825 Di2 12-Speed Rear Derailleur
£325.00
Kogel Kolossos Oversized Pulley Cage
Kogel
Kolossos Oversized Pulley Cage
£525.00
Campagnolo Super Record EPS Wireless Rear Derailleur
Campagnolo
Super Record EPS Wireless Rear Derailleur
£788.99
SRAM Eagle GX 12-Speed Rear Derailleur
SRAM
Eagle GX 12-Speed Rear Derailleur
£122.00
Kogel Oversized Full Ceramic Pulley Set
Kogel
Oversized Full Ceramic Pulley Set
£320.00

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The leading brands seen on road and mountain bikes are Shimano and SRAM, while Campagnolo is another prominent brand, specialising in road cycling. Rear derailleurs handle gear shifts at the back of the bike and are compatible with 7 to 12-speed systems, while front derailleurs manage the gear changes at the front, typically offering 2 to 3-speed options.

At Sigma Sports find mountain bike derailleurs designed to take a few knocks from uneven trails or weight saving road bike derailleurs that won't let you down when you are racing.  We've also got these handy guides to adjusting front and rear derailleurs. 
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