●Extremely air-tight. Less air loss means having to inflate less. ●Extremely reliable! Each SCHWALBE tube is individually examined twice at the factory to ensure air-tightness. ●40mm Schrader Valve. ●Weight: 165g. ●Extremely air-tight. Less air loss means having to inflate less. ●Extremely reliable! Each SCHWALBE tube is individually examined twice at the factory to ensure air-tightness. ●40mm Schrader Valve. ●Weight: 165g.