The new Schwalbe One is the redesigned version of the previous Pro One tire now featuring the Addix Speed compound Smooth tread race style tire with siped shoulder grooves from improved traction RCGD - RaceGuard, a synthesis of special india rubber and several layers of nylon fabric offers very effective protection against penetration punctures while minimizing penalties ASPD � Addix Speed compound features improved rolling resistance while also increasing durability and and overall grip Standard 20x1.0 451 Wire Belted Bk/Bsk 120 280 67 RCGD/ASPD NoUPC/EAN/GTIN: 4026495862295