The Minion DHR II is a complete redesign. Acceleration, cornering and braking have all been improved TR - Tubeless Ready - sealant required DC - Dual Compound tread provides a lower rolling resistance center paired with extra grip for the corners EXO - sidewall protection which helps prevent puncture from sidewall abrasions Standard 24x2.3 507 TBLS - Fold Bk/Blk 65 60 DC/EXO/TR NoUPC/EAN/GTIN: 4717784034478