Bridgestone run-flat tires

Matched set of 4 Bridgestone RFTs, 225/45R18, 91V, DUELER H/P. I've had them since new, 2011. They have between 3-5mm of tred depth across contact face. All were rotated front to rear every 5K; no patches or repairs of any kind. Not curbed either. They would make a great set of track tires; as, they are "V" rated with soft compounds for grip in warm climates or for a lease turn in.