I'm kinda used to it, as I also own a 2006 Cadillac XLR-V (no spare either), although the XLR-V is fitted with runflats. That may be your best option, but I doubt the ride in the CTS-V will be as good as it is now with runflats. For all the miles I drive weekly, (from 600-1,000 just Monday-Friday), I can't tell you the last time I had a flat, let alone a blowout. Tires have come a long way and if you pay attention on the road for hazards you shouldn't have a problem. I'm satisfied calling roadside assistance--as long as they bring a car hauler to haul my car, rather then a tow truck!!