Continental Sonderklasse II Track Tubular Tyre

. The Sonderklasse II is an indoor tubular tyre that gives you optimum grip and mileage for excellent wooden track performance. Extremely lightweight and sporting a slick all black design, this tyre features Continental's BlackChili compound for super efficient rolling Features TPI 180 PSI rating 160 170 Sizes 28 x 23mm Handmade lightweight tubular for use at the velodrome Faster, lighter casing ISO 23 622 700 x 23c Weight220gTechnologies BlackChili Compound Continental refines newly developed synthetic rubbers with natural rubber with the proven high performance tread compound. The GP4000S II uses these rubbers with special nanometric carbon soot particles, which are optimised in shape and surface properties for best uses for the intended tyre. Tyres with BlackChili Compound reach an unprecedented level of performance. Compared to the previous best Activated Silica Compound, BlackChili tyres have 26% less rolling resistance, a 30% higher friction value grip and a 5% increase in mileage Buy Continental Wheels & Tyres from Chain Reaction Cycles, the Worlds Largest Online Bike Store.