GM is making some good stuff lately.

[Hunter]

Better yet, make some attempt to put everyone on similar compound tires with sizes the same or close to factory sizes, and it might have been a worthwhile test. But no-one does that (other than GRM). They act like the tires that come from the factory are a permanent part of the car. And the manufacturers know this, so ship the Cobalt with some decent tires that don't last particularly long and make some compromises in NVH and you win. Another useless, but expensive, test.

Agreed x eleventybillion

The tires are an enormous variable that gets completely ignored. If you send the car out with some sticky tires it has an enormous advantage. On the other hand, cars like the 135 or 335 come with those TERRIBLE run flat tires, whose motto seems to be: "if the traction's bad enough in the first place, there will be no perceived loss of traction with a flat tire!"

Anyone know what kind of tires the Cobalt comes with?