Upgrade rear derailleur without upgrading shifters?
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  1. #1
    RoadBikeReview Member
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    Upgrade rear derailleur without upgrading shifters?

    Does it make any sense to get a Dura Ace rear derailleur and have it coupled to 105 shifters?
    Happy Riding!!

  2. #2
    A wheelist
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    Quote Originally Posted by GaRandonee View Post
    Does it make any sense to get a Dura Ace rear derailleur and have it coupled to 105 shifters?
    It depends what your unit of measurement is. If you're expecting better shifting performance or extra speed then you will be very disappointed. But if for some other reason a DA derailer makes you feel good, then it's a winner.
    .

  3. #3
    Burnum Upus Quadricepus
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    Exactly what Mike said. It's the lever that does the work, not the RD.

    For the record, I have a bike with 5600 series 105 levers, and another with 7800 series Dura-Ace levers (both same time period). There's no difference in shift quality between them. However the D-A levers feel "clickier", which also means that the 105s feel smoother.

    As for RDs, I have everything from Sora to D-A, and it's all good.

    Bottom line is that Shimano makes nice stuff. Just pick your bling level and go with it.

  4. #4
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    Finally growing tired of down-tube shifters on my old steel Pinarello, I decided to move the 105 5700 groupset from my good Ti bike to the Pinarello and put Dura Ace 7900 components it. By selling a bunch of old Dura Ace 7400 stuff from my racing days and with some very good deals on the 7900 stuff with the introduction of the 9000 groupset, the whole process cost under $500.

    Turns out that while the 7900 group saves quite a lot of grams and is very quiet and smooth, it really isn't that different functionally than the 5700 group. So like Mike T. says, if it feels good do it, but it won't work any better and it won't make you any faster. For me, however, it was worth it to play bicycle mechanic and the Dura Ace stuff is really cool on my Ti bike.

  5. #5
    grizzly moderator
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    Upgrade rear derailleur without upgrading shifters?

    Quote Originally Posted by brucew View Post
    Exactly what Mike said. It's the lever that does the work, not the RD.

    For the record, I have a bike with 5600 series 105 levers, and another with 7800 series Dura-Ace levers (both same time period). There's no difference in shift quality between them. However the D-A levers feel "clickier", which also means that the 105s feel smoother.

    As for RDs, I have everything from Sora to D-A, and it's all good.

    Bottom line is that Shimano makes nice stuff. Just pick your bling level and go with it.
    No difference other than in the left shifter being the same for double or triple chain rings. On my double 5600 I feel the dud click between shifts. This is because the 5600 and 5603 used the same shifters. The 5700 series fixed it.
    With bicycles in particular, you need to separate between what's merely true and what's important.

  6. #6
    Burnum Upus Quadricepus
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    Quote Originally Posted by dcgriz View Post
    No difference other than in the left shifter being the same for double or triple chain rings. On my double 5600 I feel the dud click between shifts. This is because the 5600 and 5603 used the same shifters. The 5700 series fixed it.
    I'm not so sure about that. I have a left 5601 on the desk right now. Only two clicks--small trim and big. No "duds".

  7. #7
    I love to climb!
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    A cross bike I used to have came with 105 shifters and dura ace rear der.
    Stop in at Element Sports. www.elementsport.com
    Get Out! Have Fun!

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