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Ultegra 11-28 cassette?

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Ultegra 11-28 cassette?

Old 04-11-10, 09:42 PM
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fujiteamrc
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Ultegra 11-28 cassette?

Hello, I was wondering if the new Ultegra 6700 11-28 cassette would work 7800 Dura-ace rear derailler?
Thanks
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Old 04-11-10, 10:00 PM
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cgo
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Yes it does.
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Old 04-11-10, 10:13 PM
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bloomieracer
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No, it'll only work with the 7900 for short cages.

Haha a "friend" just laughed at me. Apparently it works fine even though Shimano says don't go there.

Last edited by bloomieracer; 04-11-10 at 10:16 PM.
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Old 04-12-10, 10:44 AM
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achoo
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Originally Posted by bloomieracer View Post
No, it'll only work with the 7900 for short cages.

Haha a "friend" just laughed at me. Apparently it works fine even though Shimano says don't go there.
Might wind up with problems if you cross chain, with either too much chain in small-small or too little chain in big-big.

Yeah, I know - just don't cross chain.
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Old 04-12-10, 10:54 AM
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It does not require a special touring derailler and a longer chain?
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Old 04-12-10, 04:26 PM
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Originally Posted by v70cat View Post
It does not require a special touring derailler and a longer chain?
The difference is only one tooth either direction vs a 12-27. That's half a link shorter and half a link longer at the extremes. Shouldn't be an issue unless you're right at the limit already. Put the bike on a stand and shift it to the extremes and feel the RD arm. Does it have enough flex left to handle half a link? If so you're good to go.
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Old 04-12-10, 05:07 PM
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Shimano says it is not a supported combination, but I'm running the 11-28 with my 105 derailer without problem (over 1,000 miles, knock on wood). It is a very tight fit when on the 28 tooth cog (not a tight chain, but clearance between derailer and cog). My other bike has a 6700 rear derailer running the 11-28 and the clearance is noticably better.
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