Schwalbe marathon gt road tyre dualguardthe dynamic marathon gt with extra comfort is for everyone who wants to be mobile every day without having to worry about flat tyres the exclusive tread design hides the newly developed dualguard which protects against cuts andpunctures in the same reliable way features bead wire compound endurance casing dualguard pressure 35 70psi weight 1100gtechnologies dualguard this new puncture protection technology from schwalbe combines two protection