Decided to do a rop speed run with the Kraton on 6S. Taped my phone to the back and headed up the street. Turned around, got going about 3/4 throttle and then pinned it. The front end raised and before I could let off, pow. Both front tires popped. Phone did a dozen cartwheels but is ok . Looks like now I'm in the market for new tires. Will probably try the backflips as I've read mostly good about them. Moral of the story, 6S is fun till it ain't!