Good evening all, I am after some advice with regards to an audi a6 alloys. I have just Bought a 12 plate 3.0tdi quattro avant it has 19" 8.5J seven spokes alloys on it with 225x45x19, however I have had this style alloy before so i want to change them i have seen some nice 5 spoke rotor alloys (genuine audi ones) 19" 8.5j but they appear to have 255x35 tyres on them ? All I want to know is what tyres should I really be looking at and can I just straight swap the wheels ? Thanks in advance rob