Will going from 16x7 rims to 18s change anything?

iltep2004

New member
I have a 05 Cadillac CTS. The factory rims are 16x7. I'm thinking of going up to 18x7 or possibly 18x8. What I'm wondering if this will change anything? I'm guessing it may change the way it rides. But what else would it affect? Would I need to change anything on the car for these? Would 18s even fit on it? Or would 17s be better? Thanks ahead of time for the help!
 
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