245/30/20 is the correct size.
That's like me going 245/40/19 in the front which is just wrong.
If it were 255/30/20 then sometimes it rubs sometimes it doesn't and maybe the vendor didn't know fully on that specific tire and you can't put the blame on him. But 245/35/20 is the completely wrong tire size, you should get a full replacement if the vendor is legit.
2009 E92 M3 | Alpine White | Black Extended | Advan RS | Turner Test Pipes | Dinan Axle-Back | OETuning | Eibach Springs | UUC SSK | VRS Front Lip | VRS Type I Diffuser | Matte Black | RPi Scoops | MS Filter | Yokohama AD08 | F1 Pinnacle
Special Thanks: Gintani | OETuning | eAs