Medium height ramped center knobs paired with aggressive shoulder knobs provide a fast rolling tire that really bites into corners Medium height ramped center knobs paired with aggressive shoulder knobs provide a fast rolling tire that really bites into corners DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required