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. SPEED - Triple compound composition where the two compounds in the outer layer are specially formulated to reduce rolling resistance and optimize tread wear and traction.