i want to get 18 inch rims on my 2001 neon, but i dont no if its possible i need sum info ppl?? if i cant whats the biggest i can get?

18's should go on your Neon just fine. I know of several first gen, Neons that have them so I don't see why it would be a problem for a 2nd gen. I believe both gens still share the 5 x 100 bolt pattern.