Clocks Go Back 25 October – Light Up Your Ride With Autumn Essentials

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12 Speed Rear Derailleurs

Precision-matched 12 speed rear derailleurs from Shimano Deore XT, Shimano GRX and Sram, made for smooth, reliable shifting on 12 speed drivetrains. Keep your groupset running at its best or plan your next upgrade with parts you can trust.

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35 products

Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+ SGS single BIKEPARTS+
Shimano Deore XT
Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+ SGS single 5.0 · 8 reviews £76.72£109.99−30%
Shimano SLX RD-M7100 SLX 12-speed rear derailleur; Shadow+ SGS Sold out
Shimano SLX
Shimano SLX RD-M7100 SLX 12-speed rear derailleur; Shadow+ SGS 5.0 · 4 reviews £45.39£84.99−47%
Shimano Deore RD-M6100 Deore rear derailleur; 12-speed; Shadow+ SGS long cage Sold out
Shimano Deore
Shimano Deore RD-M6100 Deore rear derailleur; 12-speed; Shadow+ SGS long cage 5.0 · 2 reviews £34.99£64.99−46%
Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+ GS single BIKEPARTS+
Shimano Deore XT
Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+ GS single 5.0 · 4 reviews £94.47£109.99−14%
Shimano GRX RD-RX822 12-Speed Rear Derailleur - SGS - Shadow RD+ -Black 1X BIKEPARTS+
Shimano GRX
Shimano GRX RD-RX822 12-Speed Rear Derailleur - SGS - Shadow RD+ -Black 1X£62.95£124.99−50%
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Shimano XTR RD-M9100 XTR 12-speed rear derailleur; SGS long cage; for 10-51T/single ring BIKEPARTS+
Shimano XTR
Shimano XTR RD-M9100 XTR 12-speed rear derailleur; SGS long cage; for 10-51T/single ring 5.0 · 3 reviews £135.99£214.99−37%
Shimano Ultegra Di2 RD-R8150 Rear Mech Derailleur - E-tube - 12-Speed BIKEPARTS+
Shimano Ultegra
Shimano Ultegra Di2 RD-R8150 Rear Mech Derailleur - E-tube - 12-Speed£333.00£379.99−12%
Shimano 105 RD-R7150 105 Di2 12-speed rear derailleur; E-tube BIKEPARTS+
Shimano 105
Shimano 105 RD-R7150 105 Di2 12-speed rear derailleur; E-tube 5.0 · 1 review £149.00£274.99−46%
Shimano XTR RD-M9100 12-speed rear derailleur, Single Ring BIKEPARTS+
Shimano XTR
Shimano XTR RD-M9100 12-speed rear derailleur, Single Ring£135.99£214.99−37%
Shimano GRX RD-RX820 12-Speed Rear Derailleur - Shadow RD+ - Blac BIKEPARTS+
Shimano GRX
Shimano GRX RD-RX820 12-Speed Rear Derailleur - Shadow RD+ - Blac£62.95£124.99−50%
Shimano GRX RD-RX827 GRX Di2, 12-speed rear derailleur, Shadow ES, for 51T single BIKEPARTS+
Shimano GRX
Shimano GRX RD-RX827 GRX Di2, 12-speed rear derailleur, Shadow ES, for 51T single£295.95£429.99−31%
RD-M8200 Deore XT mechanical, 12-speed, Shadow ES
Add to basket – select size
2 sizes
Shimano
RD-M8200 Deore XT mechanical, 12-speed, Shadow ES£107.95£119.99−10%
Shimano 105 RD-R7100 105 12-speed rear derailleur; black BIKEPARTS+
Shimano 105
Shimano 105 RD-R7100 105 12-speed rear derailleur; black£34.42£69.99−51%
Shimano Deore XT RD-M8200 Deore XT mechanical; 12-speed; Shadow ES; SGS BIKEPARTS+
Add to basket – select size
2 sizes
Shimano Deore XT
Shimano Deore XT RD-M8200 Deore XT mechanical; 12-speed; Shadow ES; SGS£107.95£119.99−10%
Shimano Dura-Ace RD-R9250 Dura-Ace Di2 12-speed rear derailleur E-tube BIKEPARTS+
Shimano Dura-Ace
Shimano Dura-Ace RD-R9250 Dura-Ace Di2 12-speed rear derailleur E-tube 5.0 · 1 review £407.54£699.99−42%
SRAM Rear Derailleur Force AXS E1 12-Speed Max 36T (Battery Not Included): 36T BIKEPARTS+
Sram
SRAM Rear Derailleur Force AXS E1 12-Speed Max 36T (Battery Not Included): 36T£299.39£330.00−9%
Shimano Deore XT RD-M8120 XT 12-speed rear derailleur; Shadow+ SGS double BIKEPARTS+
Shimano Deore XT
Shimano Deore XT RD-M8120 XT 12-speed rear derailleur; Shadow+ SGS double£75.10£109.99−32%
Shimano GRX RD-RX825 GRX Di2, 12-speed rear derailleur, Shadow+, max 36T for double BIKEPARTS+
Shimano GRX
Shimano GRX RD-RX825 GRX Di2, 12-speed rear derailleur, Shadow+, max 36T for double 5.0 · 1 review £195.95£329.99−41%
Shimano GRX RD-RX822-GS 12-Speed Rear Derailleur - Shadow RD+ - Black
Shimano GRX
Shimano GRX RD-RX822-GS 12-Speed Rear Derailleur - Shadow RD+ - Black£63.95£124.99−49%
Sram Rear Derailleur Force Xplr Axs D2 12-Speed Max 44T (Battery Not Included) 2023: Iridescent 12 Speed
Sram
Sram Rear Derailleur Force Xplr Axs D2 12-Speed Max 44T (Battery Not Included) 2023: Iridescent 12 Speed 5.0 · 2 reviews £279.00£322.00−13%
Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+ BIKEPARTS+
Shimano Deore XT
Shimano Deore XT RD-M8100 XT 12-speed rear derailleur; Shadow+From £76.72£109.99−30%
Shimano CUES RD-M8150 DEORE XT Di2 rear derailleur; SGS long cage; 12-speed; Shadow+
Shimano Deore XT
Shimano CUES RD-M8150 DEORE XT Di2 rear derailleur; SGS long cage; 12-speed; Shadow+£195.95£329.99−41%
Shimano Deore RD-M7200 Deore mechanical; 12-speed; Shadow ES; SGS
Shimano Deore
Shimano Deore RD-M7200 Deore mechanical; 12-speed; Shadow ES; SGS£44.95£79.99−44%
Sram Apex Eagle Rear Derailleur D1 Max 52T 12-Speed (Mechanical):
Sram
Sram Apex Eagle Rear Derailleur D1 Max 52T 12-Speed (Mechanical):£115.99£135.00−14%
Shimano Deore XT RD-M8250 Di2 Wireless Deore XT 12-speed rear mech, HYPERGLIDE, SGS long cage
Shimano Deore XT
Shimano Deore XT RD-M8250 Di2 Wireless Deore XT 12-speed rear mech, HYPERGLIDE, SGS long cage£343.76£429.99−20%
Sram Gx Eagle Axs Rear Derailleur 12-Speed Lunar Max 52T (Battery Not Included): Lunar Sold out
Sram
Sram Gx Eagle Axs Rear Derailleur 12-Speed Lunar Max 52T (Battery Not Included): Lunar£304.06£361.00−16%
Shimano Deore XT RD-M8200 Deore XT mechanical; 12-speed; Shadow ES; GS
Add to basket – select size
2 sizes
Shimano Deore XT
Shimano Deore XT RD-M8200 Deore XT mechanical; 12-speed; Shadow ES; GS£107.95£119.99−10%
SRAM Rear Derailleur Rival AXS E1 12-Speed Max 36T (Battery Not Included): 36T
Sram
SRAM Rear Derailleur Rival AXS E1 12-Speed Max 36T (Battery Not Included): 36T£255.99£285.00−10%
Sram Rear Derailleur Red Axs E1 12-Speed Max 36T (Battery Not Included):
Sram
Sram Rear Derailleur Red Axs E1 12-Speed Max 36T (Battery Not Included):£566.31£700.00−19%
Shimano GRX RD-RX717 GRX Di2 wireless rear derailleur; 12-speed; Shadow ES; SGS long cage
Shimano GRX
Shimano GRX RD-RX717 GRX Di2 wireless rear derailleur; 12-speed; Shadow ES; SGS long cage£254.95£379.99−33%
Shimano Deore RD-M6200 Deore mechanical; 12-speed; Shadow+; SGS
Shimano Deore
Shimano Deore RD-M6200 Deore mechanical; 12-speed; Shadow+; SGS£38.95£69.99−44%
Shimano XTR RD-M9260 Di2 STEPS wired XTR 12-speed rear mech; HYPERGLIDE; SGS long cage BIKEPARTS+
Shimano XTR
Shimano XTR RD-M9260 Di2 STEPS wired XTR 12-speed rear mech; HYPERGLIDE; SGS long cage£370.70£549.99−33%
Shimano Deore XT RD-M8260 Di2 STEPS wired Deore XT 12-speed rear mech; HYPERGLIDE; SGS long cage Sold out
Shimano Deore XT
Shimano Deore XT RD-M8260 Di2 STEPS wired Deore XT 12-speed rear mech; HYPERGLIDE; SGS long cage£368.12£429.99−14%
Sram Apex Xplr Rear Derailleur D1 Max 44T 12-Speed (Mechanical): Sold out
Sram
Sram Apex Xplr Rear Derailleur D1 Max 44T 12-Speed (Mechanical):£118.53£135.00−12%
Sram Apex Xplr Axs Rear Derailleur D1 Max 44T 12-Speed (Battery Not Included):
Sram
Sram Apex Xplr Axs Rear Derailleur D1 Max 44T 12-Speed (Battery Not Included):£244.97£260.00−6%
Autumn Essentials: lights, mudguards and winter kit for darker, wetter ridesShop the collection
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