Wide knobs down the middle provide control under braking and L-shaped side knobs assure support when carving loose turns 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 - sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required Tubeless 29x2.25 622 TBLS - Fold Bk/Blk 65 670 120 SPEED/EXO/TR NoUPC/EAN/GTIN: 4717784033297