Question about ominous tyre brand: Radar

Good evening, I’d like to contact you because I have a concern that causes me quite a stomach pain. My girlfriend bought an Opel mokka x annual car with her parents today and ordered a set of winter complete bikes with them at the car dealership on recommendation. I just ordered the bikes in front of me and I’m not sure what to think of them. Here the car dealer’s tyre of the brand: Radar, Type: Centigrade Plus were recommended and sold. I’ve never been irge and what is heard from this brand and even Google spits out almost nothing. No tests, no threads in forums…NOT. You can buy the tire in a two shops for 40 Euro/Stk (17 inches) which seems extremely cheap to me. I attached the AB times.