I have two 2018 Q50RS's, identically equipped. Same tires on both (Michelin Pilot Sport 4Ss); same wheels (Rays 9x19 sport wheels); exactly the same equipment on both; same air pressure on both. One of them, though, with about 22,000 on the tires, is showing severe cupping on the inside of both front wheels and abnormal outside wear. The other one, without about 5,000 miles less on the same tires, has perfect fronts: no problem whatsoever. I'm replacing all the tires with new 4Ss on the one with the problem and am taking the car in for a dealer alignment, but I find it strange why one of the cars shows this and the other one shows nothing. Any ideas?