Rim Size

[2fst4you]

Whats better on a 200 Grand Am GT 17 or 18 inch rims??

[bandit307]

Its all personal prefernce. They will both fit with stock ride height not 100% sure about lowerd GA's. Your main concernse are offset, bolt pattern, and width. Make sure you get all those right aswell.

[Wstangland]

It really depends on what look you want. i had 17s on mine looked good not to much tire not too much rim but really your choice.