The Dunlop SP Sport 5000 DSST CTT (Dunlop Self-Supporting Technology) is a ultra high performance all season run flat tire. The SP Sport 5000 DSST CTT tire offers extended mobility in the event of a tire puncture, or complete tire pressure loose. This Dunlop tire offers ultra high performance as well as all season traction in dry and wet weather. The SP Sport 5000 DSST CTT uses Dunlop’s special hardended sidewall reinforcements to give drivers extended mobility while supporting the vehicle with no air pressure. In the event of a flat tire the SP Sport 5000 DSST CTT can still be driven, but should be kept to a limit of 50 miles and at speeds of 55 mph, and will need to be replaced if internal damage doesn’t occur. The Dunlop SP Sport 5000 DSST CTT should be used to replace original equipment run flat tires on vehicles with tire pressure monitoring systems. The Dunlop SP Sport 5000 DSST CTT provides an all season tread compound and a solid continuous center rib to provide traction, tread wear and a rolling resistance to accommodate a wide range of driving conditions. The SP Sport 5000 DSST CTT is a great all season, high performance tire for vehicles requiring run flat tires.