I have a 2004 and last winter installed a set of Cray Scorpions in chrome, which are made for the C5 and the stock tires fit these wheels. WOW, they make the car look way better and seem to double the looks I get.
The stock wheels are in storage.
The chrome Crays weigh about double what the stock wheels weigh; the stockers are really lightweight peices, so if you are going for speed, not looks, keep the stockers.
You also need to get someone who has installed C5 aftermarket wheels to do the installation; otherwise they will probably break those $80 each pressure sensors. And you don't want wheels unless they are made to use with pressure sensors.
Run-flat tires are extremely difficult to mount as the sidewalls are very stiff and have almost no stretch to allow fitting on and off a rim. The key to installing the sensors is to mount the new tire on the rim with a conventional air plug and without the sensor in place, then release the pressure, pull out the air plug, break the inside seal and from the inside reach in and mount the sensor, finally repressurize to reseal the inside. You must do this as the outside tire rim will break the sensor if the sensor is mounted before the outside of the tire is sealed to the rim.
