I know it's early, but I 'm planning to purchase 4 winter tires on steel wheels (with wheel covers) for my SXT. I would like to replace the 17" wheels with 15". Would going from the 215/60/17 to the 205/70/15 be OK? I'm looking at the Michelin X-Ice tires. The specialists at Tirerack.com say that it is too early for them to give a definite answer.