Premier XC Race inspired low profile fast rolling center tread with staggered aggressive shoulder knobsMaxxspeed compound offers improved rolling resistance and wet tractionMSPD â MaxxSpeed is the latest version of Maxxisâ race compound that utilizes a silica filler to improve speed, wet traction as well as further reducing rolling resistance by 25%EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasionsTR - Tubeless Ready - sealant requiredTubeless29x2.25622TBLS - FoldBk/Bsk60170MSPD/EXO/TRNoUPC/EAN/GTIN: 4717784042558