Valve: Schrader. Continental MTB 27.5 Mountain Bike Inner Tube 27.5" x 1.75-2.5 Schrader - 40mm. Valve Length: 40mm. Schwalbe SV12A Mountain Bike MTB Inner Tube 26" x 1-1.5 Presta - 40mm. Boxed Continental Tour 26 made from Butyl.
eBay