Originally Posted by
Pegasus2
and how long is break in? 1000 miles? I've looked at and swapped out so much there is little left to do.
Unfortunately, this isn't some buzz or hum that is slightly annoying. Before I removed the links from the chain it was pretty much verging on unridable. It's far too bad to ride another 100 miles on, let alone 650. I've spent ages with it on the stand, there is nothing to see or replicate and i've changed or swapped out everything except the RD, FD and chainrings.
Not a very nice introduction to Ultegra or modern cycling :/
Thanks for you help again.
I can't imagine a problem so severe as to cause enough drag to interfere with pedaling cadence. But I'm working totally blind so can't have a sense of what's happening. Given that the dealer can't solve it either, I see two broad possibilities.
Since it can only be felt on the road, have a knowledgeable person ride the bike until it happens, then work from there. Or, it may be minor, and not be an issue except in your mind (the opposite of the placebo effect), and if you learn to ignore it, or muffle it with a different chain lube, it will go away.
Of course it may be an actual chainring issue where replacement is the only solution, but this is very rare with new high quality rings.
So, you can try your luck with a new ring, but I'd let someone else take a spin and see if they can find the same problem.