Medium height ramped center knobs paired with aggressive shoulder knobs provide a fast rolling tire that really bites into corners Race formula triple compound Ideal for technical XC courses EXO equipped models feature Maxxis` EXO sidewall protection which help prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required 3CM - Mountain triple compound , firm base layer with a medium center and soft shoulders over the top Tubeless 27.5x2.35 584 TBLS - Fold Bk/Blk 60 690 120 3C/EXO/TR NoUPC/EAN/GTIN: 4717784031637