It did originally came with run flat tires, but like many others I choose to run conventional tires. (mechanics.stackexchange.com)
By specifying that the tread pattern is to be mounted on the vehicle in a single direction only, the many design compromises found in conventional tires which can be mounted in two directions are eliminated. (firestonecompleteautocare.com)
These new tires have 40 percent less rolling resistance than conventional tires and a 5 - percent reduction in weight. (topspeed.com)