Steve, This is joe w/ the black rivi. I changed out my 15" supremes w radial tires for 14" LA wires with Coker 520's. The look is great, but the ride changes dramatically on those bias tires, especially on the freeway. Another option is getting 175 radials assuming they fit, since the side wall on the driver side on these GM cars is narrower. I can drop my car but need to be carefull on the rear height while driving. Let's connect and you can see my car to get some ideas.