Shimano 11-28 on TREK 5.2?

cakewalk
cakewalk Posts: 220
edited September 2010 in Workshop
No doubt this is dumb question.

I would presume that I can replace my 12-27 with an 11-28 (105 or Ultegra) cassette?

Bike is a 2008 Madone 5.2 - Ultegra.


Cheers
"I thought of it while riding my bicycle."

Comments

  • nickwill
    nickwill Posts: 2,735
    The 11-28 cassette is supposed to only be compatible with the new Ultegra 6700 or Dura Ace 7900 rear mechs which are specifically designed to cope with the wider spread of ratios.
    http://lakescyclist.wordpress.com/
  • sturmey
    sturmey Posts: 964
    The 11-28 cassette is supposed to only be compatible with the new Ultegra 6700 or Dura Ace 7900 rear mechs which are specifically designed to cope with the wider spread of ratios.

    Or a (cheaper) Shimano 5700 cassette for that matter.
  • Mister W
    Mister W Posts: 791
    Nickwill wrote:
    The 11-28 cassette is supposed to only be compatible with the new Ultegra 6700 or Dura Ace 7900 rear mechs which are specifically designed to cope with the wider spread of ratios.

    It's supposed to be but there are plenty of people running 28s with other Shimano mechs. You may have to tweak the B screw but it should work okay.
  • richiebones
    richiebones Posts: 379
    i have 11 - 28 on both my bikes, and it works fine with both the ultegra and 7800DA rear mech's, you just have to play with the b screw
  • Twostage
    Twostage Posts: 987
    I've got a similar question. Can I use an 11-28 or even 11-32/11-34 on a tiagra ? Is the hg-50 and hg-80 interchangable ?
  • John.T
    John.T Posts: 3,698
    Twostage wrote:
    I've got a similar question. Can I use an 11-28 or even 11-32/11-34 on a tiagra ? Is the hg-50 and hg-80 interchangable ?
    Yes for 11/28 with careful set up.
    No for 11/32. The top jockey will rub on the bigger cogs. You need a Deore mech or similar.
    Just about all questions about lower gears are covered here.
    http://www.bikeradar.com/road/forums/viewtopic.php?t=12583566
    My Fleet.
  • Twostage
    Twostage Posts: 987
    John.T wrote:
    Twostage wrote:
    I've got a similar question. Can I use an 11-28 or even 11-32/11-34 on a tiagra ? Is the hg-50 and hg-80 interchangable ?
    Yes for 11/28 with careful set up.
    No for 11/32. The top jockey will rub on the bigger cogs. You need a Deore mech or similar.
    Just about all questions about lower gears are covered here.
    http://www.bikeradar.com/road/forums/viewtopic.php?t=12583566

    Cheers John T. I've now got an 11-28 on my old Alu racer. I would describe the difference between a 25 and 28 as being noticeably easier rather than stunning improvement. Worth it though. Haven't had chance to see the difference at the other end of the cog - 11 instead of 12.

    Didn't need to adjust anything which was a bonus. :)
  • andy_wrx
    andy_wrx Posts: 3,396
    Answering original question, Spesh (at least, probably other manufacturers too) were spec'ing some Tarmacs and Roubaix a couple of years ago with 5600 105 or 6600 Ultegra and with a SRAM 11-28, so they think it works...

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