Smooth overall profile provide a durable yet comfortable ride with low rolling resistance and excellent traction due to it`s directional tread and heavy siping. B2B - 2 ply nylon breaker beneath the tread surface made for road tires. EBIKE - has achieved a passing rating for use with E-Bikes up to 28mph and is ECE-R75 approved. SW - SilkWorm increases puncture and tear resistance with a reinforced breaker beneath the tread surface. DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires