I called Jegs and they did not know what the measurements were for the trim rings as they evidently don't have the specs in there info. They had me call wheel vintiques direct and they told me that they don't make the correct size ring for the 15x7, The 2.25 is all they make. The ring for the 15x8 wheel would fit better but it is not shaped correctly for pontiac, it is shaped for Corvette wheels. What a bunch of CRAP to tell you this after you have installed them, instead of telling you up front that they don't have the right ones. Anyone have any Ideas???