what do the small triangle's at the edge of the tread signify on tires? is this where the rubber should be worn down to. Does it signify if there is to much air or not enough in the tire? just my guess
You want the marker to be rubbed off at the tip of the triangle for optimum pressure. If there is still markings above the triangle, your pressure is too high. If the markings are rubbed off past the tip of the triangle, your pressure is too low.