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Code: R8050GK
Shimano Ultegra R8050 Di2 11 Speed Gear Kit
Upgrade to the very latest Ultegra electronic shifting with the Ultegra R8050 gear kit
Kit Includes:
  • STI Levers: STR8050 brake/gear levers including brake cables
  • Rear derailleur: RDR8050, SS version for up to 11-30 cassettes and the GS for 11-32 and 11-34 cassettes
  • Front Deraileur: FDR8050, Braze-On
  • Internal seatpost battery and charger included.
  • Cables Included: 2x 350mm, 1x 300mm, 1x 650mm, 1x 700mm, 1x 1000mm
  • Di2 Junction Boxes Included: SM-JC41, SM-EW90-A


Mark Why have I waited so long ! Used for the first time today and nothing but flawless gear changes all through the ride. Satisfying little bleep and ‘electronic buzz’ when changing. Brilliant!!
Mr Kuwahara This kit has enough parts to upgrade to Di2. It fits my bike but may not reach the length of the cable depending on the size.
Mr Williamson Great kit! I’ve installed it on my new bike and have rode 200 miles so far and I absolutely love the product.
M. C. Amazing upgrade, enjoying riding my bike even more now, super crisp instantaneously gearing, semi-syncro mode is amazing. will never go back to mechanical.
Mr Miller Great bundle, this is all you need to get your mechanical conversion completed, I was worried that I may not have enough cables but all worked out perfectly. I would have preferred to be able to choose a 5 port junction box but the package is what it is.
mark Absolutely love di2. First time trying it and am so glad I did. So easy to index the gears with no cables and lovely to use. Would definitely recommend
Mr Ami My bike came with internally routed mechanical cables. When the right cable broke I decided to replace it with the Di2 electronic groupset to eliminate the problem from ever happening again. What a huge difference! This bike didn't shift this well when it was new. The mechanical cable had a housing that ran all the way through the frame. With that much housing there was a lot of cable friction when shifting. That is now gone and the shifting is fast and crisp. This groupset is sensational. I would say it is the best groupset Shimano has ever made and certainly the best I have ever owned.
Mr Bowen This kit arrived very promptly and complete. I was unable to get any of the local bike shops to install it right away. So I did it myself. With the aid of online instructions and advice from friends, I was successful. I'm very happy with the result.
WilBailey Super!! Upgraded my 2017 Specialized Roubaix from 105's to Ultegra Di2 R8050 Speed Gear Kit. (I left original Praxis Chain set and mechanical disc brakes) Shifting is just what I was hoping for. Smooth and snappy. I'll need to buy the Shimano Bluetooth unit in order to fully customize it from my phone, but right out of the box it was ready to go. Did a quick 30 miles on it this morning and with the Di2 Kit and new 3T Discuss C35 Pro Wheelset, I feel like I got a new bike! Thanks MerlinCycles.com for making quality gear affordable!
Mr Phillips Great value upgrade that contains everything you need, including cables etc, apart from a clip to secure the battery.
Mr Leith Great kit, wouldn`t go back to mechanical now. Fantastic service from merlin cycles
Andy Just upgraded my ultegra group set to DI2 and so pleased with it. Top quality product and so happy I did it. Service from merlin cycles was excellent and very helpful!
WarrenT This groupset shifts like a dream. Braking is excellent too. Super fast shipping from Merlin. Highly recommended.
Mark Got fed up messing about with cables and decided to upgrade to di2. This was cheapest I could find and and as bike already had R8000 mechanical set up it was ideal for me. Would definitely recommend if you fancy changing to electronic gears. Easy to fit and great to use. You might need a couple of accessories such as cable tie set to prevent wires rattling inside frame and also di2 grommets for snug fit on wires.
james This was my first Di2 kit. I am very happy with both the way it looks and operates. Gear changing is very smooth and reliable.
Thomas Excellent delivery. The DI2 just delivers smooth and perfect gearshift. BUY BUY BUY, worth every penny!
Mr moennis This product is superb, looks good and works perfect. and also very easy to adjust and make setups .
Dan W A lovely upgrade that makes all gear changes super smooth.
Jim The Di2 kit is great, easy to fit on a bike with internal routing. I was very impressed by how smooth the shifting is. I`ll upgrade my other bike too. Very quick delivery, was delivered to Australia in 5 days.
Mr Angelon I am very pleased and satisfied with the purchase. I put it on the bike and it was perfect. The after sales service is magnificent
chris The Di2 kit is the best upgrade, I came down from Dura Ace mechanical to Ultegra using this kit, and don't regret it at all. I am thinking of upgrading another one of my bikes.
Mr Bradley The Ultegra DI2 is awesome, touch heavier than Dura Ace but same functionality. Awesome.