kyotoshiba

I bought a dealer showroom test car having 2000 km from the dealer from another country where I reside. I drove it just 100km yet. I realized it was making a knocking sound on tight turns at low speed, or when I left the parking, etc. It feels like the front tires are sliding, making vibrations. Is it because it has a sports suspension? It is below 7 Celsius, and summer tyers are on. Should I check it at the service?

I am also waiting for the 21-inch Amg rims to be delivered. Right now, it has 20-inch Amg rims. Do you have any specific suggestions for winter and summer tires for this car?

Currently it has 255/45 ZR 20 (105Y) Front and 285/40 ZR 20 (108Y) back. Right now, it has these rims.

I am going to change it with this.