Does the noise change at all with a change of cassettes? I’ve found some of the Rival and Force cassettes to be louder than the Red cassettes. The Red cassettes have “stealth rings” which help but also show that it’s a common problem that Sram knows about.
Fair warning… It will likely get louder with wax. And if it doesn’t immediately get louder faster than any other chain. This has been my experience with Sram 12 anyway. I still wax though. I just wax my Sram equipped bike far more often than the others.
Sorry, I don’t have an answer but I feel like I hear/feel a similar noise from my Campagnolo drivetrain. In particular, only when it’s in the 11 tooth cog (the smallest) and it’s more noticeable on the trainer. Since I hardly use the 11 I’ve never really made an effort to sort it out.
My hunch is that it has to do with the wrapping of the chain around the smallest cog in a high force area.
@mikehhhhhhh I think the chain may be rubbing against the FRONT derailleur when in the lowest gears. Were you in the big chain ring when filming the video? The noise also coincides with your pedal stroke. I recommend you check your front derailleur setting, bottom bracket, chain rings, and tightness of your cranks.
Put it in the smallest or second smallest cog and take a pic from the side. I think your chain is too long and it’s rubbing on itself/the upper pulley in those gears.
Is the trainer being used with the right 12mm adapter? Do you have it on 148 instead of 142?
Is the trainer’s freehub body seated all the way in? the cassette may be tilting in the smaller cogs.
Are you using an XD or XDR driver? A spacer behind the cassette?
I’ve had the chain rubbing on the front mech, on the trainer, because of the bike flexing sideways under load. It doesn’t happen outdoors, because the bike leans. I could also not see it when just pedalling by hand, because the frame didn’t flex then.
I just got a bike with Sram Red AXS, have used both the Force 10-36 and Red 10-33 cassettes with 46/33 up front. No noise at all, silent. Quieter than my Campy 11 and Campy 12 bikes.
I tried to see which chain you are using. Is it a Sram flat top chain?