Positive 1/8 Buggy Tires Mounted on Yellow Dish Rims,The Jetko "Positive" is great on grooved, hard packed clay, with medium moisture. The angled lines into, and the solid line around the sidewall help with side bite and structure. The square pins in each outer row, and the small bars inside the inner rows help when the tire is driven out of the groove. Vertical bars reduce wear caused by tire expansion at high speeds. These Jetko Positive 1 8 Buggy Tires include lightweight, grooved closed cell inserts.