Shimano Derailleur Comparison - Part 1

In this episode I'm comparing the first generation of 11 speed rear Di2 derailleurs. Dura-Ace RD 9070, Ultegra RD 6870-SS and Ultegra RD 6870-GS.
I'm covering materials, visual and technical differences, servo motors, and finally common issues and how to fix them.
If I haven't covered something, or you have any additional questions, please comment below.
Video chapters:
0:00 Intro
0:42 Materials
1:35 Visual & Technical Differences
10:27 Servo Motors
12:42 Common Issues and How to fix them
15:34 Outro
www.bettershifting.com - Everything you want or need to know about Shimano Di2 components and much more.
Disclaimer
The information contained within this video is for general information purposes only.
Di2_GP assumes no responsibility for errors or omissions in the contents of the video
In no event shall Di2_GP be liable for any special, direct, indirect, consequential, or incidental damages or any damages whatsoever, whether in an action of contract, negligence or other tort, arising out of or in connection with the use of this video or the contents of Di2_GP CZcams channel. Di2_GP reserves the right to make additions, deletions, or modifications to the contents on the video at any time without prior notice.
#di2 #diy #rideshimano #shimano #cycling #broken #shifting #howto #ultegra #duraace #di2gp

[@ridesofjapan]

Gods work! 👑

[@Di2_GP]

You're too kind! But I'll take it 😉

[@ivanradoszyce8183]

Another great video. Thanks Pawel.

[@Di2_GP]

Thank you!!! I appreciate your support!

[@horststorkebaum6475]

Thank you Pawel for investing the time to explain those mechs in detail. You really have dug very deep into the intricacies of their design.
Do you have a recomendation for an oil which you use to lube the pivot points and keep the O-rings happy?
I'd also be interested in a video about the RD-M9050 and RD-M8050

[@Di2_GP]

You are very welcome. I personally use silicone spray lubricant. It acts as SBR, rubber conditioner, water rappeler, etc. Oils tend to be to viscose, there isn't much space there. Also they act like a magnet for the dirt. If RD is in good condition, water should not get inside. The biggest enemy of RDs is salt (either from the road, or form cleaning products) The compartment where those pins are rotating is sealed from elements, with two o-rings, if/when they fail that's when problem start.
I have a maintenance video on my to-do list, along with XTR, XT, RX817 comparison video (spoiler alert they are very similar (XT and 817 the same ;-)