Eagle 077s, 17s in front, 18s in back

[Ted]

A lot of people do bigger rim sizes on the back. I have 17s all around now. But im kinda getting tired of the look, I wish I had 18s, but don't want to buy all new wheels again. What do you think if I put 18s in the back. Unfortunatley they don't make the 18s any wider then an 8. But what do you guys think. Is it worth it?

[trinitron]

They do make 9 in 18s, they are 168, i think they look better.