As you are trying to get a set of new rims for your car, you should consider whether they match your old tires or to get a new set of tires, because the rim width decides the width of the tire that match the rim. There is a best tire width for the rim of each width, and two workable tire widths which are 10mm more or less than the best tire width, for instance, if the rim width is 6J, the best tire width is 195mm, and the also workable tire widths are 185mm and 205mm.