11-28 cluster on standard ultegra dérailleur

Wily-Quixote
Wily-Quixote Posts: 269
edited June 2012 in Workshop
Is this a successful combo? LBS says I need a long cage dérailleur. Are they right?

Comments

  • jibberjim
    jibberjim Posts: 2,810
    Runs fine on all my bikes with both 6600 and 5700
    Jibbering Sports Stuff: http://jibbering.com/sports/
  • rothers_bikeo
    rothers_bikeo Posts: 225
    What have you got on the front ?
  • Wily-Quixote
    Wily-Quixote Posts: 269
    53-39t front chainrings
  • Cleat Eastwood
    Cleat Eastwood Posts: 7,508
    i've got 11-28 with ultegra rear mech - i use this medium cage

    http://www.wiggle.co.uk/shimano-ultegra ... ur_GS-Grey
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    momentarily from the herd and thinks for himself.
  • Wily-Quixote
    Wily-Quixote Posts: 269
    Cheers, I think I must have the short cage, I presume I'll need the medium cage GS?
  • nickbuchan
    nickbuchan Posts: 26
    dunno if this is any help but I'm running 50/34 up front with SRAM Rival short cage at the back, run a 28T cassette with no worries, 28T is apparently the max though.
  • mister p
    mister p Posts: 405
    Short cage SS will be fine.
  • sungod
    sungod Posts: 17,504
    go to http://techdocs.shimano.com

    choose road->ultegra

    scroll down to the rear mechs section

    click on the si-* document for your model of ultegra

    the document tells you the capacity and maximum sprocket size
    my bike - faster than god's and twice as shiny
  • smidsy
    smidsy Posts: 5,273
    53-39=14 and 28-11=17 so you need a rear mech that will do 31t.

    Standard shimano short cage is anything from 29t to 33t depending on model/year
    Yellow is the new Black.
  • keef66
    keef66 Posts: 13,123
    It's not just the total capacity that matters, but the size of the largest sprocket too. I don't think any short cage Shimano will accommodate a 33t cassette
  • smidsy
    smidsy Posts: 5,273
    keef66 wrote:
    It's not just the total capacity that matters, but the size of the largest sprocket too. I don't think any short cage Shimano will accommodate a 33t cassette

    Correct. The above was the total capacity only.

    I should have added maximum cog size for a short Shimano rear mech is normally 27t - again can vary slightly with model/age. Latest Ultegra has been designed to take a 28t though.
    Yellow is the new Black.
  • jibberjim
    jibberjim Posts: 2,810
    smidsy wrote:
    I should have added maximum cog size for a short Shimano rear mech is normally 27t - again can vary slightly with model/age. Latest Ultegra has been designed to take a 28t though.

    Latest Short cage Ultegra (6700A SS) goes up to 30 with a max teeth of 34. You'll also find they regular go larger than spec, as I said above I have no problem with 50/34 11-28 or 53-39 or 52/36 or 48-34 on 6600 and 5700 SS derailleurs. And Maryka ran a 50/34 11-32 whilst pregnant on an SS 6600, although I think the short chainstays helped a lot to make that work.
    Jibbering Sports Stuff: http://jibbering.com/sports/
  • Wily-Quixote
    Wily-Quixote Posts: 269
    Thanks guys I'll order the cluster and see how it works TY to all contributors, I appreciate it.
  • fludey
    fludey Posts: 384
    It will be fine I have short cage ultegra 6700 rear mech with a 53/39 up front and changed my 11-25 to 11-28 works fine, it will even reach on 53/28 combo but I never ride this amount of cross over. :D
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  • Wily-Quixote
    Wily-Quixote Posts: 269
    Tx fludey.

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