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. ADX – Addix compound found on the Performance Line made to serve as an all-around well balanced compound for all uses