Found a new
video by BMW Blog showing the camouflaged car in motion with some close up stills afterward. Overall, there's very little to take away except maybe that the test car is sporting 245/35ZR19 front and 265/35ZR19 rear Michelin Pilot Sport 4S with star markings denote bespoke BMW specifications. That's a solid improvement. Hopefully it implies the fenders will be able to handle even wider tires in the aftermarket.
The relative difference in tire height and /m markings on the wheels makes me assume this example is a RWD m240i.
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17x9 APEX Arc8-R, 255/40/17 RE71RS, Vorshlag Plates, Swift Spec-R Springs, m-Performance Bumpstops, Dinan ShockWare, Paragon 2-piece rotors, Carbon lip, custom 3" alumalite splitter, GTS wing, FTP Intake and Charge pipe, BootMod3 Stage 1 OTS