Wasn't sure where to post this so I'm going to throw it up here. I just traded for a set of XXR 518 rims that are 18x8.5. The tires that are on them are 225/40/R18. They are junk and need replaced. I put them on the car and they fit fine but I'm wanting to know what size I should put on the rims? The tires that are currently on them seem too narrow for the rims if that makes sense.. Also they need what appear to be some small lug nuts. My factory 94 lugs don't even fit inside the holes. Any help you guys can give me would be appreciated.