You can also use a 205/55/17 (25.88") on a 17 x 7" w/o problem.
IMO, if your trying to cut weight then go with the 205/55/17, but the 215/50/17 will give you the best tire selection and cost no more then the 205.
Last edited by 99Bluz28; 12-09-2010 at 01:22 AM.