Fast, sporty, and tread-less slick tire Fast, sporty, and tread-less slick tire Equipped with RaceGuard, Schwalbe`s mid level puncture protection Checkered shoulders offer extra protection against cuts and abrasions Speed Grip compound offers improved grip, better damping, and extreme durability 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