Round profile block tread with micro-textured knobs and micro-siped center line for traction on pavement EXO - sidewall protection which helps prevent puncture from sidewall abrasions TR - Tubeless Ready - sealant required Tubeless 20x1.75 406 TBLS - Fold Bk/Blk 100 380 120 EXO/TR NoUPC/EAN/GTIN: 4717784032894