Shimano Ultegra 6800 Rear Derailleur
Shimano Ultegra 6800 Rear DerailleurShimano Ultegra 6800 Rear Derailleur
From £37.50
RRP £74.99 Save 20%
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Code: RD6800
Shimano Ultegra 6800 Rear Derailleur, 11 speed model for the 6800 groupset
  • For use with Shimano ST6800 STI levers, also compata?ble with the Dura Ace 9000 groupset
  • 2 models SS for up to 28t and GS for up to 32t
  • Product code: RD6800
  • Shimano Ultegra 6800 11 speed rear derailleur
  • More equal shifting effort throughout the full range of the cassette
  • Maintains precise shifting over an extended time period
  • Wide link design increase rigidity and reduces shifting deflection


Great service from Merlin, easy to buy online, fast despatch, well packaged and protected. The deraillieur itself is light and works a dream.
Excellent quality item, light with a solid fast action eveything you'd expect from Ultegra components
The best derailleur for the price. Ultegra quality and engineering as usual and Merlin price, more accurate than 105
Great product, needed to buy new derailleur for 11-32 cassette and it works a treat
Great derailleur, does the job well. The changes are as good as expected. Obviously a derailleur is part of a bigger system. Mine is linked to an Ultegra shifter and it works together very well, as expected.
Great derailleur, shifts well, great value for money. Can't beat it
As you'd expect this just works. Never seen a difference in performance between 105 and ultegra but you pay more for less weight.
Awesome rear derailleur. Removable jockey wheel cage so I could use an oversized pulley wheel upgrade, the 105 Rear derailleur wouldn't let me.
Solid and Reliable and the lowest price on the planet..!!!!
Works great with the rest of the Ultegra groupset and allows for additional gearing for the hills around Yorkshire. Excellent service from Merlin - arrived very quickly.
I required this derailleur to fit a 11-32 cassette onto my bike. Shifting has been flawless and crisp. I could not find any difference in performance to the shorter cage derailleur, and am grateful for its extra capacity.
Crisp gear changes & great looks, works very will in muddy cyclocross conditions too
It works perfect with the 9100 series front derailleur
I did want to buy Duraace rear Derailleur but Shimano didn't make in medium cage, so for my 11-32 Ultegra cassette I bought the medium cage Ultegra (10 or 20 gram more than the short cage ultegra RD). It is very solid RD with strong spring, totaly recomended.
I still wish they made a road/CX clutch rear, but other than that, it is great (and yes, I know WTC makes the TanPan to allow you to run an MTB rear with road shifters... but it's heavy and bulky looking).
Blinders on, you can`t tell the difference between this and dura-ace. Excellent shifts.
Excellent function. I purchased the GS for my cyclocross 1x build. Works fine... Wish Shimano would release a clutch RD for STI shifters though.
Lovely shifting moved from 10 speed Dura ace and now a ultegra convert!!
Very smooth shifting.
Jockey wheels spin so smooth. Top quality.
Previously ridden Shimano 105 and this is definitely an upgrade. Very smooth changes both up and down the rear sprocket. Easy to fit and adjust using instructions from Shimano's website.
Allows use of an 11-32 cassette, which is one of the best things I've bought this year. Also long enough for my drive train to handle cross-chaining big-big, which is an awesome gear for racing (as it avoids shifting the chainrings, which is a bit of a pain generally). Of course I love the ultegra, it's super smooth and responsive, and the color is lovely.
Bullet proof and easy to setup. Nice action.