SET OF TWO: Motorcycle Tire Inner Tube 90/90-19 | 100/90-19 | 3.25/3.50-19 - TR4 Straight Valve Stem SET OF TWO: Motorcycle Inner Tube 100/90-19 (90/90-19) - 19" Rim Size TR4 Valve Stem: Straight Stem, Round Shape to fit on rims with a round valve base. Fits on these Tube Type Tires: 3.25/3.50-19, 90/90-19, 100/90-19, 110/80-19 Heavy duty durable valve stem. Unbeatable performance and value.