Shimano's R8000 vs 6800 Ultegra Rear Derailleur
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  1. #1
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    Shimano's R8000 vs 6800 Ultegra Rear Derailleur

    Building up a new bike and contemplating using my existing 6800 11spd rear derailleur or is it worth getting a new R8000...

    if any, what are the noticeable differences between the two?
    "I refuse to be afraid of tomorrow, for I have seen yesterday & I love today!!"

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    Orbea Onix w/Ultegra R8000
    2009 SCOTT Speedster w/Ultegra 6800
    2007 IRONHORSE HT

  2. #2
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    A) The R8000 parts are "shadow", AKA they move the RD knuckle in-board and make the RD less exposed.

    B) The road parts get direct-mount compatible removable-B-linkages...Unfortunately, the standard really hasn't taken off on road, it does make shifting better.

    C) You can get clutched RDs if you need them with the newer parts. Lessens chain slap, and holds chain tension better on rough terrain like MMR or gravel or single/double-track roads/paths.

    Those are the big things to notice.


    My groading rig has slider-drops....so I've tried R6870, and RD-8050 on a conventional RD-hanger, and RD-8050 direct-mounted. The RD-8050 is a better mouse-trap for off-pavement use for certain. Mean to spend some $$$ when I can justify it on a clutched RD, haven't felt the need just yet.
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  3. #3
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    So I pulled the trigger and purchased the R8000 RD. The derailleur delivered was a long cage 34 tooth compatible... This is what happens when you make an on-line purchase late at night and after a few beers ...

    I meant to order a 30 tooth, I really don't want to go through the hassle of returning/exchanging.

    1) Can I swap my 6800 short cage with the long cage on the R8000?
    2) If yes, what are the pro's and con's

    If no, I guess I can live with the long cage and buy a replacement chair to compensate for longer cage routing or is it not that big of deal since I will be using my 11-28 cassette ?
    "I refuse to be afraid of tomorrow, for I have seen yesterday & I love today!!"

    "There are only two ways to establish competitive advantage: do things better than others or do them differently."

    "Ability may get you to the top, but it takes character to keep you there."

    Orbea Onix w/Ultegra R8000
    2009 SCOTT Speedster w/Ultegra 6800
    2007 IRONHORSE HT

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