So i had the sound on my GoodYear EagleF1s OEM ,It's not a tire brand problem and it's not a 20" wheel problem. It's a high performance sports car problem. Some folks obviously have not owned many sports cars and don't read enough. or don't retain what they do read, if they still don't understand. My 981S Michelin PSS tires do it here in FL at 85F in the wet. So get used to it. It is a trivial problem unless u r clueless and hit the gas with wheels fully turned. Then u might hit something and it's not the car's fault. It's ur fault for being a reluctant learner.
After i changed to Michelin pilot sport 4s, the sound has stopped !!
So in my case it proved to be tire brand.