Low rolling resistance thanks to a polycotton Corespun T 320 TPI casing - butyl inner tube that retains set pressure for long time (needed when leaving the bike in "transition zone" the day before the event) - Kevlar SiO2 3D Compound for a light and fast tyre Our new high density casing - a true 320 TPI - delivers unbeatable comfort and superior performance with inflation pressure of up to 200 psi! New PRB 2.0 puncture resistant belting placed underneath the tread increases the flat prevention properties up to 40%, even while reducing the weight - Pressure: 9/14 bar 130/200psi - Weight: 230g