Mid-height tread blocks are spaced evenly to allow penetration through loose trail conditions and openly for better mud-clearing compared to other race tires Mid-height tread blocks are spaced evenly to allow penetration through loose trail conditions and openly for better mud-clearing compared to other race tires Wide cupped knobs down the middle provide excellent braking on the sloppiest singletrack 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 EXO equipped models feature Maxxis` EXO sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required WT - Wide Track casing optimized for rims over 35mm internal width