The new Schwalbe One is the redesigned version of the previous Pro One tire now featuring the Addix Speed compoundSmooth tread race style tire with siped shoulder grooves from improved tractionRCGD - RaceGuard, a synthesis of special india rubber and several layers of nylon fabric offers very effective protection against penetration punctures while minimizing penaltiesASPD - Addix Speed compound features improved rolling resistance while also increasing durability and and overall gripADX â Addix compound found on the Performance Line made to serve as an all-around, well balanced compound for all usesStandard20x1-1/8451WireBeltedBk/Bsk12028067RCGD/ASPD/ADXNoUPC/EAN/GTIN: 4026495862295