I have a trailer which accommodates two children. I want to introduce my son to the joys of this.
It attaches to a bike via a clamp which grips the chainstay.
Unfortunately all of my current bikes have disc brakes. The mounts interfere with the trainer clamp and I can’t move the clamp forward due to foot overlap. The clamp is designed to grip a horizontal tube.
Is there an adapter to allow the trailer to attach to th the QR, or any other ideas?

what does the attachment look like?

may help

https://robertaxleproject.com/what-axle-do-i-need/