Schwalbe Rocket Ron Addix Tire 29x2.25 Folding Tubeless Ready Addix Performance TwinSkin 67TPI BlackThis XC Rocket combines speed and corner control at the highest possible level. An excellent all rounder for racetracks. Tread design: balanced proportion between stable studs and sufficient gaps for excellent rolling characteristics and amazing self cleaning properties. 27. 5+ versions with additional stud rows. TECH SPECS Tire Diameter ISO 29 622 Tire PSI 26 54 Tire Type Tubeless Ready Tire Compound Addix Performance Tire Weight 715g e Bike approved