Tire diameter is the bigger factor here than wheel diameter. What size tires are you running? I saw you picked up some 205/55R16 Firehawks but those don't look like the same wheels? Stock Cobalt sizes range from 24-25.6", which, combined with your suspension setup, will dictate ground clearance.
For additional reference, a 225/45R15 should be about 23" tall, so you're giving up 1" ground clearance vs a 25" tall 225/45R17 (which is my size).