Durable all weather urban tread with Schwalbe`s RaceGuard belt for lightweight protection. REF - Reflective sidewall striping or hotpatch to aid in low light visibility. SPDGRP - SpeedGrip - Addix SpeedGrip compound is Schwalbe`s all around performace upgrade compound well versed on all terrain and conditions. RCGD - RaceGuard - A synthesis of special india rubber and several layers of nylon fabric offers very effective protection against penetration punctures while minimizing penalties. 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