My 18's Are really not that heavy actually the blades i took off are only about 1kg lighter than my wheels now i really dont see IF i go back to stock that i am gonna get much more....
and if thats the case i may as well loose the backseat and the carpet and the A/C if im gonna go that far i think 18"s are fine my gueards are rolled and doesnt really rub at all
i will though in the future be going to 17" and get some more tyre but for now ill take my .0005 slower of a second wheels