Kenda Mountain Bike Inner Tube, 32mm Presta Valve (26" x 2.1-2.3") Weight: Approx. 192 g (6.77 oz) with nut & cap Valve (stem): Presta 32mm threaded, removable core Size: 26 x 2.1-2.3" Mountain Wall thickness: .90mm (standard weight) Tube Compound: Butyl