Ultegra 6700 vs. 105 5700 rear derailleur - performance and longevity?
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  1. #1
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    Ultegra 6700 vs. 105 5700 rear derailleur - performance and longevity?

    So I'm reading that I shouldn't be able to tell the difference between new, correctly tuned 105 and Ultegra derailleurs. I'll buy that.

    Anyone know if there's a difference that would effect service life? I've had this bike long enough to wear out a 105 derailleur, so if Ultegra will last longer, I'll switch.

  2. #2
    Rub it............
    Reputation: frdfandc's Avatar
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    Only difference is weight. There is no performance or longevity difference between the two. Only way the Ultegra would last longer is if you did not do any thing to the 105 derailleur and then kept meticulous maintenance on your Ultegra stuff.
    You can't fix stupid.

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    I kind of wish it were legal to staple people in the face.

  3. #3
    What the what???
    Reputation: Opus51569's Avatar
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    Just curious, how long did it take to wear out the 105?
    Given his penchant for nicknames, and his aversion to reading, I've decided to shorten Donald J. Trump to it's essence: Dump*

    I was "social distancing" before it was cool.

  4. #4
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    The bike is a '99 model I bought in 2000. I rode a fair amount for a year, put it away for a while, then started riding more again about five years ago. I moved to Seattle in 2008, so that includes three winters here.

    I don't track my mileage, so no specifics there I'm afraid.

    The bike will be getting another 105 derailleur, unless the universe provides me something else for the same or lower cost.

  5. #5
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    front or rear? I assume you are still 9-speed? I wouldn't switch to a 10-speed front derailler so you may be limited to what you can source in old stock 9 speed 105/ultegra or 9 speed tiagra. The 10-speed FDs are narrower IME and will cause rubbing in more gears

  6. #6
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    The bike has been ten-speed for a few seasons. Nothing blew up or failed. The 9-speed front derailleur shifts fine, and it'll stay on there for as long as that remains true - I'm just replacing the rear derailleur.

  7. #7
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    Were you happy with the performance of the 105 you had? Yes? Just replace it with another 105.

  8. #8
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    That's not long of a life.
    I have a single track mind

  9. #9
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    Seattle winters are hard on a bike. I also wonder if I'd be noticing the problem yet if I'd stayed with a 9-speed setup. When I wasn't riding it, the bike was on loan to my Mom for a while. I don't know how much she rode it, though. There are also some scuff marks on it, and while I don't remember laying it down on the right, it must have come in contact with something.

    I'd say it's done a lot better than the Tiagra derailleur on my 'cross bike. I got that bike in '08, and it needs a new derailleur too. It doesn't get nearly as much ride time, but most of the riding I do on it is off-road, and a lot is racing.

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