- Familiarity: I've used it several times
I am not sure if it is just a poor design or if i just got a lemon, but my 28 tooth cog creaks terribly. All the other gears are fine, but shift up to the 28 and the creaking begins. My riding buddy has the same issue with his, but both his 26 and 28 cogs creak. I switched back to to an Ultegra cassette and all is fine. Until Shimano comes up with a new design, take the Ultegra weight penalty and steer clear of the Dura Ace cassette.