"The SP Sport Maxx GT 600 DSST CTT is an Extreme Performance Summer run-flat tire featuring Dunlop Self-Supporting Technology (DSST) developed for the all-wheel drive Nissan GT-R super sports car. Merging both car and motorcycle tire development and manufacturing technologies, the SP Sport Maxx GT 600 DSST CTT was created as a Combined Technology Tyre (CTT) to enhance ride quality while providing temporary extended mobility for a distance of 50 miles at up to 50 mph even after a puncture has allowed complete air pressure loss. However, like all Extreme Performance Summer tires, these tires are not intended to be serviced, stored nor driven in near- and below-freezing temperatures, through snow or on ice."