Need new tyres very soon and wondering does anyone know what's the widest size that can be fitted to the standard 18" alloys? Standard they are 225/40/18...has anyone fitted 235 or 245/40/18's without any hassle?....answers appeciated.....Fitted 235/40/18's to wheels and fitted to rear with no probs, would'nt recomend going any wider than 235's on standard rims.