Pneumatico Delle Vittorie
Retired "Tire" Guy
To make a DOT approved product the tire company must follow industry processes with the correct materials, sizing, sidewall markings etc. Then they torture test them on the drum with extra load at speed, etc. then finally road test them and if that specification passes the tire is DOT approved. The results are recorded as required by the tire associations (North American & European) that most if not all of the "good" tire companies belong to, and you're good to go and can release it to the public.
