The Speedster was designed for rolling speed and minimal drag on hard pack or paved terrain. E-bike approved version features a 120 TPI and tubeless ready construction. Bomb Proof models feature Aramid belting Dual Control Compound for superior grip and a higher TPI casing for a durable responsiveness. DCC - Dual Control Compound features two kinds of materials for speed and control hardness of 56A in the center and a lower 48A on the sides. EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kph. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires