New circular design on the sides for improved grip that reduces the depth of the patern gradually to reduce weight and one piece centre line to makea faster, smoother and grippiest tire while rolling, and the solid centre line make a more durable tire that wears off less that regualr tires and thismake the tire to last a lot longer. It is made with "Silkworm" material, the same as the popular Ruben tires, to make a more puncher proof and rigid flatland tire.
It comes is 20X1.75 and is available in Black and White.