Rows of 3 medium sized hollow square knobs fill the center tread, while more pronounced, well spaced knobs handle the cornersCloses the gap between Racing Ralph and Thunder Burt, as it is faster than Racing Ralph and provides more grip than Thunder BurtXC racing tire developed in collaboration with Olympic silver medalist Mathias FlückigerReinforced transition area between center and shoulder blocks for optimal SnakeBite protectionSPDGRP - SpeedGrip - Addix SpeedGrip compound is Schwalbe`s all around performace upgrade compound well versed on all terrain and conditionsTubeless29x2.25622TBLS - FoldBk/Tan5468067TLR/SPDGRP/E25UPC/EAN/GTIN: 4026495927567