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Swap out Ultegra rear for XT?(8 posts)

Swap out Ultegra rear for XT?aguyincolorado
Aug 21, 2003 11:06 AM
Bought a used bike recently and am interested in getting wider gearing. I'm a tech novice and would appreciate any input.

Possible to swap out the Ultegra cassette and derailleur for XT? Would there be any complications? Problems with the hub? Gotchas I should be aware of?

Thanks for the help!
your fine....Chicago_Steve
Aug 21, 2003 11:41 AM
Keep in mind that with a bigger cassette you must use an MTB derailleur. An Ultegra rear derailleur max's out at 27T for a low gear. With an XT rear derailleur you can go up to 34T. Hubs and shifting should be fine.

Steve-O (currently running an Ultegra cassette on an XTR hub with an XT derailleur and Ultegra shifters)
you'll need a longer chain too (nm)laffeaux
Aug 21, 2003 11:55 AM
You can run more than 27 on Ult. rear derailleurpack_fodder
Aug 21, 2003 2:38 PM
I think you can run up to 30T (I've run a 28T on my DA without issues). I think the 27T limit stems from the fact that Shimano's largest road series cassette (Ultegra) is a 27.
re: Swap out Ultegra rear for XT?lute mile
Aug 22, 2003 11:08 AM
I currently run a full Ultegra drivetrain with an XT 11-34 cassette with little trouble. I cannot see why it would be any different for your situation.

Aug 22, 2003 11:17 AM
Any issues shifting into the 34T on the rear? Just curious, as I have always heard that road derailleurs have issues with the bigger MTB cassettes. I could see an 11-30T (which died when Shimano went to 9 speed) but I was always under the impression that a 32T or 34T was beyond the Ultegra derailleurs capabilities...
long cage or short?arctic hawk
Aug 22, 2003 12:11 PM
I would assume you have a long cage Ultegra unit to support the longer chain to wrap around the 34T.
I always thought MTB cassettes would not work with Ultegra/Dura Ace derailleurs.

Arctic Hawk
thanks for the advice!aguyincolorado
Aug 25, 2003 6:51 AM
Thanks very much for all who posted replies. Much appreciated!