Our dual density Technology uses multiple rubber compounds used to improve feel and durability;Harder rubber compounds give you improved rolling resistance and improved longevity, while softer compounds on the outer tire improve grip;Will help to reduce your risk of flats through the use of thin weave nylon layers between the tire casing and tread layer;Intergrated Flat Protection System;Tightly spaced center lugs for fast rolling;All conditions tire;Wire bead ensures a secure fit;Max PSI = 65