Have a bubble on 2 Bridgestone potenzas run flat, oem. Car and tires have 10,500 miles. Tires are diagonally opposite, rear driver and front passenger side. 1) front 245/40/19 run flat and 2) rear 275/40/19. Have not hit potholes. Wrote to Bridgestone - no reply, on the website they claim that they respond within 3 working days. Also took car to Bridgestone/Firestone dealer in westbury, NY. They deny that this is a manufacturer defect. I believe that this is a manufacturer defect given that: 1. tires did not hit a pothole, even if it did, hopefully they are designed to hit potholes, at least some of the time; 2) this happened within 10,000 miles; 3) they are on diagonally opposite sides, 4) they happened as a result of inner and outer linings not having been glued well in the manufacturing process. The manufacturers have not even bothered to document the complain to assess if there indeed is a manufacturing problem.

- Roslyn, NY, USA