Air Plus tubes feature an increased wall thickness to help prevent punctures and pinch flats, while maintaining air pressure better when compared to a standard tube.Item SpecificationsISO Diameter584 / 650b / 27.5"ISO Width (mm)53ISO Width (mm)54ISO Width (mm)55ISO Width (mm)56ISO Width (mm)57ISO Width (mm)58ISO Width (mm)59ISO Width (mm)60ISO Width (mm)61ISO Width (mm)62ISO Width (mm)63ISO Width (mm)64ISO Width (mm)65ISO Width (mm)66ISO Width (mm)67ISO Width (mm)68ISO Width (mm)69ISO Width (mm)70ISO Width (mm)71ISO Width (mm)72ISO Width (mm)73ISO Width (mm)74ISO Width (mm)75ISO Width (mm)76Labeled Size27.5 x 2.1 - 3Shaft TypeThreadedTube CompoundButylValve CoreRemovableValvePresta Short 32-40mm Schwalbe Air Plus Tube Tubes EAN: 4026495871716