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Discussion Starter · #1 ·
I love my DA 7800 group--shifts and brakes perfectly. Only thing is that I wish I had a compact. Can the 7900 compact crankset (or the new Ultegra 6700 compact) run smooth on the 7800? I hear the 7900 and 6700 chain rings have slightly different teeth so it may not run smooth on my 7800 chain. I don't want to have to get a new 7900 chain which may mean getting a 7900 cassette, which will make the whole endeavor pointless and not cost conscious anymore.

Thanks for all chimers in!

EDIT: My thread title should have a "?" since I am afterall asking a question!
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