My G80 is wearing standard Conti tires. Doing 100 km, following a truck, I couldn’t avoid running over the rock in the road (probably half the size of one’s fist) it must have been sharp because after the front left tire ran it over the rear left must have just clipped the side wall. The pressure sensor went into “warning” mode. Slow leak on the rear tire. Got to a tire store just down the road. They said the side wall had been damaged.....couldn’t be fixed, gotta replace it. These tires are unique, so nothing was available anywhere in western Canada. The order was placed with Continental in Southern Cali. It took five days to arrive and the total was CN$586.00. Now if I had had some significant mileage on the tires I would have be replacing all four tires because of the AWD setup on the Sport model. Are Conti’s junk? I don’t think so. This the first car that I’ve owned with low profile tires. They really don’t like pot holes, curbs or running over trash on the road. So, coming from driving Chevy Suburbans for the past twenty two years where I could drive over almost anything, potholes included, my take on these Conti tires is that they need to be driven with some care. Lesson learned.