Iz tvog linka:
"There are three basic technologies currently available, described below.
Self-supporting"
I nastavak
"Most recently, Bridgestone and Pirelli run-flat tires are supplied on some new model BMW cars. The automaker promoted these as a safety feature and as an alternative to carrying a spare tire.
Self-supporting run-flat tires are now common on light trucks and passenger cars and typically provide for the vehicle to drive for 50 miles (80 km) at around 50 miles per hour (80 km/h). However, if the tires are subject to this kind of misuse, they may become irreparably damaged in the process. In addition, if the tire is punctured in the sidewall or at the edge of the tread, repair may be impossible or unsafe. These tires carry a 20 to 40 percent weight penalty over similar standard tires.[4] The thicker sidewall also means higher rolling resistance, thus reducing the vehicle's fuel economy.[4]"
Prijevod riječi flat, kad se koristi zajedno sa rječju tire znači prazna guma.
Ove samozakrpavajuće gume izgube jako mali dio tlaka, dakle nisu prazne.
Na bajku imam mlijeko u gumama i jako dobro znam kako samozakrpavanje funkcionira, to mlijeko možeš kupit i za auto gume, samo je pizdarija kod zamjene guma, malo je neuredno.