My opinion for what is worth, maybe less than two pennies, is to stick with the tires that Porsche has listed as acceptable tires. These tires Porsche has tested and bring out the best performance in the Boxster. Remember what keeps you save is the grip of the tires I would rather spend my money on the tires they recommend, since I value my safety, as well as my passenger's , more than savings a few hundred dollars every so often.
