Schwalbe marathon plus mtb tyre smartguardthe schwalbe marathon plus mtb tyre with smartguard is the most puncture resistant mtb tyre in the schwalbe range on the central rib it rolls easily over hard paths while the strong outer lugs give it great off road traction features typewire carcass smartguard colourblack reflex skintwin psi 30 65buyschwalbe tyresfrom chain reaction cycles the worlds largest online bike store