Inner Tube 2.25/2.50-16 - Off Road Motorcycle Tire Inner Tube - TR4 Straight Valve Stem - fits on 70/90-16 Motorcycle Inner Tube 2.50-16 TR4 Valve Stem TR4 Valve Stem: Straight Stem, Round Shape to fit on rims with a round valve base. Fits on these Tube Type Tires: 2.25/2.50-16, 70/90-16, 80/80-16, 80/90-16, 90/80-16 Heavy duty durable valve stem. Unbeatable performance and value.