The Racing Ralph everything is designed for speed and because of its race bred roots puncture protection is minimal. ASPD � Addix Speed compound features improved rolling resistance while also increasing durability and and overall grip. EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kph and is ECE-R75 approved. SSKN - A light and flexible carcass makes the tire highly resistant to scrubbing. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires