Downhill: constructed of a dual-ply robust 60TPI casing combines no-compromise durability, while retaining traction and support over the most rugged terrain Enduro: constructed of a dualply 120TPI casing is supple and fast rolling with improved traction while providing high levels of support EN:Wall A butyl layer located within the casing ply, providing the highest level of sidewall defense Grip3S compound is a front specific, triple density 40/42/60a compound, offering the ultimate level of grip and slow rebound properties