I had a 2019 Donington and a 2021 Brands Hatch. Both had the 20" OEM wheels. I bought the BMW winter tire and wheel set: 19" Orbit Grey 705M wheels with Michelin Alpin 5 tires. The fronts were still 9.5" wide, but the tires are 265 instead of 275. The rears are 285s on 10.5" wheels. Tire diameters are the same for both.
Donington
I then powder coated them gloss black and ran them on the 2021
Brands Hatch
Now they are looking for a new home because the won't fit on my M850.
I even bought one set of summer tires to run part time on the 19" 705 set because I liked the 5 spoke look.