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  1. #1
    Cat 3 Meter - Don't Care fauxto nick's Avatar
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    Need some emergency derailleur help...like right now

    I have a ride early tomorrow morning and a race Sunday. I'm still new at working with derailleurs. Anywho I just had my bike converted too a double with a double (new FD, cranks, and bottom bracket. I ended up putting on an upgraded pair of cranks tonight same brand just went from 105 Octalink to Ultegra Octalink, even kept the same bottom bracket. When I put the chain back on the front derailleur was throwing the chain off the big ring when it shifted up from the small chainring.

    I messed around with the limiter screw (the one closest to the outside of the derailleur and it seems to be working fine now. I'm still going to take it to a shop but I doubt I will have time before my race on Sunday, so I need to be confident with my adjustments. My questions are is the limiting screw how you would adjust this problem? Also when you adjust the limiting screw should you be in the small ring if you're adjusting it for the big ring? When I tried to adjust the limiting screw when I was in the big ring it didn't really move but if I put it in the small ring it worked fine. It's probably also being finicky because I'm using 105 triple shifters adjusted for a double.

    Any late night help would be appreciated.

  2. #2
    Senior Member wrobertdavis's Avatar
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    2008 Cervelo R3
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    I ride 5000 miles/year in Texas with wind, rain, heat, armadillos, and wild boars.

  3. #3
    Cat 3 Meter - Don't Care fauxto nick's Avatar
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    Doh' should have thought of that, thanks. I think that answers my questions, I guess we'll see if I blow any shifts tomorrow :/

  4. #4
    :p Harun's Avatar
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    Quote Originally Posted by fauxto nick View Post
    It's probably also being finicky because I'm using 105 triple shifters adjusted for a double.

    yeah they're like that- try adjusting cable tension.

  5. #5
    Senior Member wrobertdavis's Avatar
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    Quote Originally Posted by fauxto nick View Post
    Doh' should have thought of that, thanks.
    I'm glad it helped.
    2008 Cervelo R3
    2011 Surly LHT
    1992 Miyata Triplecross set up for commuting
    1992 Miyata 914
    1980's Univega Gran Sprint
    I ride 5000 miles/year in Texas with wind, rain, heat, armadillos, and wild boars.

  6. #6
    Cat 3 Meter - Don't Care fauxto nick's Avatar
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    Well I took it out today and it actually shifted really well. The park website recommended when adjusting the limiters in the big chain ring shifting all the way down but leaving it in the big gear so basically the cable was slack. Then making your adjustments and pulling the cable tight with your hand to see how much of a change your adjustment made; this worked really well. The limiters are actually pretty straight forward.

    I think I'm still going to take it into a shop to have it fine tuned before my race if I can but if I can't this should hold up.

    Does anyone actually know if the 9 speed 105 shifters are triple and double compatible like the ultegra and dura ace are? Would I get that much of an improvement getting double shifters?

  7. #7
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    Shimano 105 9 speed are double/triple compatible (same shifter, just adjust the derailleur stops). Not sure about Ultegra, but the Dura Ace shifter is either a double or a triple, different shifters.

  8. #8
    Senior Member thefatguy's Avatar
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    The question begs to be asked...

    Why would you need anything but the bigring in a race anyways?

  9. #9
    Harsh Generation Benjamin11's Avatar
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    Mad hills?
    Quote Originally Posted by coasting View Post
    i climb at <10 mph. you want to take this outside?

  10. #10
    Out of Commission OC Roadie's Avatar
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    Nick, you won't need your F/D at Dominguez Hills, big ring all the way. I know that doesn't answer your questions and you still need your shifting dialed, but don't stress about it for Sunday. Good luck, I like that course.

  11. #11
    Cat 3 Meter - Don't Care fauxto nick's Avatar
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    Quote Originally Posted by OC Roadie View Post
    Nick, you won't need your F/D at Dominguez Hills, big ring all the way. I know that doesn't answer your questions and you still need your shifting dialed, but don't stress about it for Sunday. Good luck, I like that course.
    How are the hills I was thinking of running a 12-21 on a 53/39, or should i bring my 12-26.

  12. #12
    slow up hills kudude's Avatar
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    i hate, hate, hate shifting my FD in a race. That said, if you think you have it dialed, don't just take it to a shop "because". waste of time and money IMHO.
    Quote Originally Posted by mr_tom View Post
    Cycling isn't a sport. It's more like a really, really expensive eating disorder.

  13. #13
    Out of Commission OC Roadie's Avatar
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    Quote Originally Posted by fauxto nick View Post
    How are the hills I was thinking of running a 12-21 on a 53/39, or should i bring my 12-26.
    The hills are short and not steep. Run the 12/21 for the tighter spacing in the range of gears that you'll be using (12-17). Even if you end up in 53/19, you won't be crossing up enough to be a problem.

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