http://www.grandprixforums.net/official-what-you-need-how-cts-v-brakes-46217.htmlSuggestions:
You MUST have 18" wheels for this upgrade PERIOD. You CAN NOT run 17s. I also suggest that the wheels be 35mm offset or less, 40mm might be close but it could be doable if the spokes are setup right. On my car the spokes are about 5-8mm away and I’m running a 32mm offset.
they Rota p45R only come in the 9.5" thats the only reason why i was looking at those... trying to find some 18's that will fit the CTS-v calipers is hard