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swapping from 12-27 to 11-28 rear mech compatability

ed34ed34 Posts: 8
edited December 2010 in Workshop
can i run a 11-28 cassette with a 6600 (ultegra) or 5600 (105) rear mech? The shimano site says you need the newer 6700 / 5700 mechs for a 11-28 and max for the older mechs is a 27 tooth.

thanks, Ed


  • maddog 2maddog 2 Posts: 8,114
    it'censored and miss ed

    some frames and chain tension will manage it but some won't, even with the tension screw on max. I speak from experience. I've got 6600 mechs to handle 11-28 but I've had others end up rubbing the top sprocket, no matter what.

    You can either try and see, or go for the 5700/6700 mech and it'll definitely work.
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • Monty DogMonty Dog Posts: 20,614
    I agree, you can try it and see - I fitted a 11- 28 to an old Ultegra gruppo and it worked fine
    Make mine an Italian, with Campagnolo on the side..
  • No problems with 11-28 on Ultegra 66series (triple) using a long-cage rear derailleur.

    Just wish Shimano would make a 13-28 as 11-28 is ridiculous for a normal cyclist!
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