GM didn't use a 5x112 bolt circle on any of its small cars during the years the Cobalt was built. Unless someone made an aftermarket set of hubs, those are 5x110 bolt pattern hubs. If you will be using them be certain to match the wheel bolt pattern as a 5x112 may look like it will fit, but the wheel studs will not be centered in the bolt holes and the lug nuts will not be seated correctly. At best, torquing will bend the studs, at worst the stress will break studs.