Wide knobs down the middle provide control under braking and L-shaped side knobs assure support when carving loose turns TERRA - 3C Maxx Terra is softer and offers more traction than 3C Maxx Speed, yet provides better treadwear and less rolling resistance than Maxx Grip 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 Tubeless 29x2.4 622 TBLS - Fold Bk/Blk 50 60 TERRA/EXO/TR/WT NoUPC/EAN/GTIN: 4717784033839