9070 and 9170 compatibility
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  1. #1
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    9070 and 9170 compatibility

    I have a Domane with full 9070 Di2. I would like to upgrade cassette to 11-32 or 11-30. What is the best way to do this. Can I use a new 9170 rear derailleur to get 11-30 or Ultegra Di2 rd to get 11-32?

  2. #2
    'brifter' is a lame word.
    Reputation: cxwrench's Avatar
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    Yes, either. The new Ultegra will work w/ a 34.
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  3. #3
    Cleavage Of The Tetons
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    I am using a new Ultegra (long cage) rear with a 40, it shifts flawlessly.

  4. #4
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    is that a 10 or 11 or 12 speed di2?
    If its a 10, where did you get it?
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  5. #5
    Adorable Furry Hombre
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    Quote Originally Posted by cxwrench View Post
    Yes, either. The new Ultegra will work w/ a 34.
    Or, I've heard rumor or people swapping the D/A (short) cage for the Ultegra mid-cage in order to make a D/A R9170 mid-cage RD...if you can get just the cage it would certainly be cheaper than a new RD.
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  6. #6
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    Quote Originally Posted by Marc View Post
    Or, I've heard rumor or people swapping the D/A (short) cage for the Ultegra mid-cage in order to make a D/A R9170 mid-cage RD...if you can get just the cage it would certainly be cheaper than a new RD.
    That is interesting. Iíll look into that.

  7. #7
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    Quote Originally Posted by sasquatch16 View Post
    That is interesting. Iíll look into that.

    Saw it on the r/bikewrench subreddit a few days ago:

    https://www.reddit.com/r/bikewrench/...ace_9100_rear/
    "Refreshingly Unconcerned With The Vulgar Exigencies Of Veracity "

  8. #8
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    Thinking Iíll just get a RD-8050 GS and call it a day. Know that will work.
    I am sure if I search Iíll find it but is big-big + 2 without RD the best way to size chain?

  9. #9
    Rub it............
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    I always use - small small with RD. Make sure the chain doesn't hit the body of the RD.
    You can't fix stupid.

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  10. #10
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    Yep went back and searched. That seems to be the CX approved method which is good enough for me.

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