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