FWIW I just mounted up 245/45x16's on S4 rims. Book says it won't fit on a 91. Clearance is very close in the inner rears, so I removed the liner which is no big deal. Seems to be plenty of clearance, even with the wheels 40mm offset. Will monitor noise and debris. For those looking for fitment experience, HTH. Regards, Jerry South F.L.A. 91 200 STEADItqw