Maxxis Rambler TR Tire - Clincher Low profile, tightly packed center knobs paired with well spaced corner knobs make for a fast rolling tire ideal for gravel riding The less aggressive height of knobs make this a great multi use tire suitable for grinding some gravel as well as light trail work 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 help prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required