A square profile provides a solid, consistent feel across the knobs. Modified knobs on the shoulder and center improve braking performance and traction on hard surfaces. 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 Tubeless 27.5x2.8 584 TBLS - Fold Bk/Blk 35 970 60 DC/EXO/TR NoUPC/EAN/GTIN: 4717784031910