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  1. #1
    Member level37's Avatar
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    Shimano 105 10-speed front derailleur with 9-speed everything else?

    Hello-

    Will a 2010 10-speed 105 FD be compatible with a 2001 105 drivetrain and brifters? Shimano redesigned the derailleur for 10-speed, and I am wondering how well it will work with a 9-speed chain.
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  2. #2
    Senior Member ScottNotBombs's Avatar
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    Are they for the same size chainrings? Other than that I don't see why it wouldn't work other than the chain possibly rubbing on the cage a little more easily because the 10-speed has a skinnier FD cage. Why not just get the 9-speed though?
    I'm just a kid who gets in trouble sometimes

  3. #3
    Member level37's Avatar
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    9-speed is getting tough to find new. 10-speed is easy to find, and I'm impatient to get my drivetrain swapped over to my new frame (with a different sized seat tube.)
    www.SometimesIEvenRideTheDamnThings.com
    my cat can eat a whole watermelon

  4. #4
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    Is it a double or a triple crankset? If triple you should try really hard to find a triple 9-speed or 8-speed.
    If double then a 10-speed will work but a 9-speed would be better, as explained in the previous post.

  5. #5
    Member level37's Avatar
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    It's a double. I'm going to give the 10-speed a go, since I can't find a 105 or better 9-speed in a 34.9 clamp diameter anywhere. Hopefully the plates aren't that much closer in the 10-speed design.
    www.SometimesIEvenRideTheDamnThings.com
    my cat can eat a whole watermelon

  6. #6
    Gear Combo Guru Chris_W's Avatar
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    Tiagra is 9-speed. I expect that current Tiagra stuff is not much worse or the same quality as the 2001 105 stuff that it's replacing. I'd therefore go with a new Tiagra FD.

  7. #7
    Junior Member JPtheApostle's Avatar
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    Get the Tiagra 9-speed!

    I am doing exactly what you were thinking of: a 105 10-speed front derailleur and everything else is Ultegra 9-speed circa 2001. The derailleur changes chainrings flawlessly, but it rubs and chatters in way too many gear combinations, about 1:6-9 and 2:1-4. My LBS heroically tried to make it work, but I think the cage is just to narrow. The noise is maddening, and it is unavoidable in the gearing that I use for a long 1-2% uphill grade, and/or a flat grade in a headwind, in the city, or when I'm pooped. It's also a big psychological downer to have noise/function issues with 1/3 of your gears.

    Get a 9-speed front derailleur, is my strong recommendation. I am.

  8. #8
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    Well, I'm using a 10-speed 105 triple front derailleur on an 8-speed bike and it runs perfectly. However, my front shifter is friction so i can trim it at will. With index front shifting I doubt it would be so cooperative.

  9. #9
    AEO
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    Senior Member AEO's Avatar
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    just spread the cage a bit, then it'll be 9sp width.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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  10. #10
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    Buy the braze-on version here: http://www.bicyclebuys.com/drivetrai...nt/1010131PART and add a 34.9/35mm adapter clamp like this: http://www.bicyclebuys.com/drivetrai...nt/1010137PART

    The beauty of this set up is a new frame will require at most a new adapter clamp.

  11. #11
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    Quote Originally Posted by joejack951 View Post
    Buy the braze-on version here: http://www.bicyclebuys.com/drivetrai...nt/1010131PART and add a 34.9/35mm adapter clamp like this: http://www.bicyclebuys.com/drivetrai...nt/1010137PART

    The beauty of this set up is a new frame will require at most a new adapter clamp.
    I'm a big fan of braze-on type front derailleurs and suitable diameter adapter clamps. For a given bike the clamp is a one-time purchase and braze-on derailleurs are less expensive than their clamp-on versions.

  12. #12
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    I forget who first pointed this out to me (someone on these forums, might have been you HR) but I'll likely never again buy a clamp-on road front derailler.

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