I was driving home today, and as I got on the highway, my car started shaking at about 60-65 mph. I slowed down to about 50, and finished the trip home. Tires aren't the best (stork Dunlop) but they only have 1000 miles on them. They look fine too. It felt like the shaking was coming from the back of the car. I'm not sure if this could have an effect, but it's pretty damn cold out. About 28 degrees where I was. I've never had a tire pop before, so I don't know what it feels like before it happens. I'm going to take her in tomorrow, as she's still under warranty, but I'm still pretty worried. Any help would be appreciated.