Sorry, this product is no longer available!
Shimano Ultegra 6800 Rear Derailleur - 11 Speed is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
Shimano Ultegra 6800 Rear Derailleur
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Shimano Ultegra 6800 Rear Derailleur - 11 SpeedShimano Ultegra 6800 Rear Derailleur

This item was discontinued 14th May 2021.

If you require help finding an alternative to this product please contact customer services.

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


Leo C. As Shimano's quality, accuracy and reliability like no others.
Mr rosser Great price and its Ultegra... !! Never disappointed with a Merlin purchase, always competitively priced..
E Robertson Simple to set up and works perfectly
Malinda Great quality and value for money. Upgrading to Ultegra from 105 and I really enjoy it
Dr Mohamed Good quality
Eric Great derailleur - easy to install and set up and rides great.
Syco VCRT Quality Shimano product and an incredible price - cheaper to replace mech than the jockey wheels
Mr Tkaczyk Hot Damn. Shimano's 11-speed Ultegra 6800 groupset is really, really, really good. That's this review in a nutshell, but in the spirit of drawing things out I'll write a few more words on the matter. There's lots to say. But the bottom line is: for the serious fitness rider or privateer racer, as a package, this is as good as a mechanical groupset has ever been.
David No issues, easy to install and set up, works perfectly in my mixed 8000/6800 setup
Samuel Great shifting, easy to install and set up.
Mr Duguid Excellent Shimano quality with the usual question of this brand: Why buy Dura Ace when Ultegra this good? And unlike r8000 Ultegra it's all metal, so should last years with flawless function, aside from replacing worn jockey wheels.
Alex I used to only purchase Dura Ace, although the gap between Ultegra and Dura Ace has narrowed not to mention the cost difference. Ultegra, a must for dependability!
Mr Scott Great service from Merlin, easy to buy online, fast despatch, well packaged and protected. The deraillieur itself is light and works a dream.
Mr Cole Excellent quality item, light with a solid fast action eveything you'd expect from Ultegra components
Jean The best derailleur for the price. Ultegra quality and engineering as usual and Merlin price, more accurate than 105
Mr McCarty Great product, needed to buy new derailleur for 11-32 cassette and it works a treat
Neil Townsend 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.
Mr michal Great derailleur, shifts well, great value for money. Can't beat it
Jonathan As you'd expect this just works. Never seen a difference in performance between 105 and ultegra but you pay more for less weight.
Andrew B Awesome rear derailleur. Removable jockey wheel cage so I could use an oversized pulley wheel upgrade, the 105 Rear derailleur wouldn't let me.
Ron Anderson Solid and Reliable and the lowest price on the planet..!!!!
Ben R 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.
Mr Filipek 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.
Matthew Crisp gear changes & great looks, works very will in muddy cyclocross conditions too
Mr Presto It works perfect with the 9100 series front derailleur
Mr Yazman 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.
ezweave 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).
Gzepi Blinders on, you can`t tell the difference between this and dura-ace. Excellent shifts.
Castren Excellent function. I purchased the GS for my cyclocross 1x build. Works fine... Wish Shimano would release a clutch RD for STI shifters though.
Richard Lovely shifting moved from 10 speed Dura ace and now a ultegra convert!!
Kim Very smooth shifting.
JRidesaFelt Jockey wheels spin so smooth. Top quality.
Mr Pfeiffer 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.
Archer 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.
PK Bullet proof and easy to setup. Nice action.