Any issue with 18's?
 

Im wanting to get some volks gt-n or LE28N, i havent decided on the size yet im either getting 18x8 or 17x8, my car's lowered on tein s tech until i get my coilovers in. so I just wanna make sure that 18's arent a problem with the s techs, the cars pretty low and i think it might be an issue.

You also need to take into consideration the offset of the rims.If you are worried you may want to invest in some coilovers.Also depending on what offset and how wide the rims are you may have to get some fender rolling done.

Why not go with a wider rim? with the right offset you can run wider tires. The stock wheel is already 8". I'm running an 18x9 +35 offset and 255/35-18's with NO rubbing at all. Just my .02