Will an 8 inch rotor clear the stays on the rear of a 2011 135mm QR Firebird?
There should be no issues running a 203mm rotor on a Firebird.
"The face of a child can say it all, especially the mouth part of the face".
I have always run one on mine and it's fine. If you need an adaptor, PM me as I have a fancy Hope CNC one available.
"It looks flexy"