Duro Bicycle Tube 26″ x 1.50/1.75″/1.90″ (33mm) Standard American/Valve . Review Posted on February 18, 2019 By DuskunkTagged Cycling, Duro, Outdoor Recreation, Sports & Outdoors, Tubes This fits your . Make sure this fits by entering your model number. Bicycle Inner Tube American/Schrader 33mm Valve