I just had the unfortunate experience of running something over which puncture the side wall of my right rear tire. It's about an inch gash which blew the tire, but I was still able to drive the vehicle to a stop and it never shut down. I'm also having a hard time getting a replacement, no one has them in stock, and everyone is quoting 5-7 business days for the 195/55/R15 Bridgestone Ecopia EP150 because they have to order directly from Bridgestone, even the dealers. Unfortunately it's my only vehicle during the week, and need a vehicle, so was able to hunt down a donut spare from a 2011 Chevy Aveo for a temp fix (craigslist $20). Mounted up perfectly, tracks well, and appears to have a similar contact placement, but only a 14" rim (rim and tire are about an inch smaller in height compared to stock). My Spark starts up and let's me drive it even though tpms is reading zero. I'm only going about 10 miles and on roads with 45mph or less posted speed limits, so wouldn't recommend it unless you're in a bind or want a temp fix but seems to work ok.