Originally Posted by
THSdrummer
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.
A few other q's:
Does it make this noise on the road or just on the trainer?
Do you have a spoke magnet that's twisted out of plane and is hitting something? A valve nut that's still on that might be loose?
deep sky's comment is also a good one - if your RD needs some adjustment with the barrel adjuster to get better alignment with the cogs?
Lots of options