Originally Posted by
Beaker
It's something to do with your rear wheel - the give away is that the frequency of the knocking sound increases as you move up the cassette - i.e. it tracks speed - and it doesn't seem to track cadence which it should do if it was a BB issue.
Do you still have the dork disk? Is your wheel out of true rubbing something? Does that noise continue if you coast?
Out of true was a thought I considered. When the noise first started, it sounded like it was rubbing the brake every rotation, but it was not.
The dork disk is not on now.