tire sizes?
 

hey guys i got some 18x8 cobalt ss wheels. they dont need new tires at the moment but soon they will. im looking at doing stretch tires. i dont want alot of stretch so i was thinking 215/55/18 to give it that stretched look but not to stretched. and so it fills out my wheel gap more for when i lower my car with coils.

cobalt wheel=no fit

what's a stretch tire??