The Schwalbe Air Plus Tube 13-AP is an extra robust inner tube for 26 inch bicycle tires. Thanks to the increased wall thickness, this Air Plus inner tube retains the air considerably longer, requiring less frequent inflation. In addition, it offers above-average protection against punctures, ideal for intensive and daily use. Specifications: Brand: Schwalbe Model: Air Plus Tube 13-AP Inner tube type: Air Plus Material: Butyl Wheel size (inch): 26 ETRTO: 40/62-559 Valve type: AV (Auto) Valve length: 40 mm Weight: 290 g Article number: 13-AP Schwalbe AIR PLUS bicycle inner tube no. 13 AP. For bicycle tires in size 26" inch (ETRTO 40/62-559). Retains air even longer thanks to the greater wall thickness. Less frequent re-inflation required. Also offers above-average protection against punctures.