The Minion DHR II is a complete redesign. Acceleration, cornering and braking have all been improved TR - Tubeless Ready - sealant required DD - Double Down construction features two full 120 TPI casing layers reinforced with a butyl insert Tubeless 27.5x2.3 584 TBLS - Fold Bk/Blk 65 120 TR/DD NoUPC/EAN/GTIN: 4717784031859