Fronts are 245/40/18
Rears are 275/40/18 and are illegal
TBH, I wouldn't knock a huge amount off if you didn't want the tyres. It would cost me to get them removed and i have absolutely no need for 2 18" tyres - i already have a garage full of junk to shift without adding more to it
you would be better off buying them as they are and sorting the tyres yourself