Hi, I bought new tires and rims in November. These are for my summer car and were mounted on it. As the car wintered over, I was immediately pumped up to 4 bar. When I drove the tires today for the first time, I discovered cracks on all four tires on the outside. See pictures. The tires were driven by me 10km. Would you throw them down or continue driving? I worry about these cracks. The tires are by the way from Nexen and were 2018 g ==References==