Originally Posted by
Nyah
I highly recommend this idea to all disc brake-coveters while they hold out for a thru-axle bicycle, rather than buying a QR-disc bicycle that will forever be a lemon. I'm serious. People are better off making their rim-brake bicycle look like it has disc brakes, than to settle with the QR-junk being passed off as disc brakes in the era of thru-axles.
I’ve read this claim here on BF, and yet I’ve been riding such bikes for years without issue.
To the OP, I agree with the above issue raised about a rotor being flat and not contoured, and being relatively thick. I think you’d have issues with your derailleur hitting it when in low gear.