That was the front wheel, i agree that it is too thin, but i made it according to blueprint and it is 20 CM width.
I googled this
Quote:
Front Wheels: 19 x 21 IN / 48.3 x 53.3 CM
Rear Wheels: 19 x 28 IN / 48.3 x 71.1 CM
car body:
Length: 169.3 IN / 4300 MM
Width: 74.8 IN / 1900 MM
Height: 45.9 IN / 1166 MM
But when i make the wheels that wide, here's the result.

the upper front wheels are 20 CM width and rear wheels are 30 CM width
the lower front wheels are 53,3 CM width and rear wheels are 71,1 CM width.
About the tread pattern
I googled this
Quote:
Front Tires: 235/35 ZR 19
Rear Tires: 295/30 ZR 19
so i found this zr 19

and made texture from it.