Originally Posted by Kid Red
I wonder if you'd still rub in 275? You're on stock sport suspension?
Yes, I am on stock suspension, and I think 275 would have been an easy fit. However, I think front and rear side walls should match.
245/35/19 would give 245x35%=85.75mm side wall
285/30/19 would give 285x30%=85.50mm side wall almost equal
275/30/19 would give only 275x30%=82.5mm side wall which would be 3mm shorter than the fronts. Most people wouldn't even notice but just knowing it would have bugged me. So I pushed harder to be able to fit the 285s in there.