Join Date: Dec 2005
Location: Charlottesville, Virginia
Bikes: Dawes Kalahari, Puch Prima Super Sport, Graham Weigh 853
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Shifting, indexing and whatever will be fine. You only need a new chain if the old one is cooked. How many bikes have those Ultegra cranks anyway? Most have Truvativ or FSA. Nania seems to have swallowed the marketing. Sure, Shimano and Campagnolo will optimise differently, but they are aiming for the same thing; fast shifting.
Stronglight and FSA do make different rings for the two, but this is due to the bcd, not the shifting or chain compatibility!