Inner Tube 3.25/3.50-16 TR4 Staight Valve Stem - Fits on 100/80-16 | 100/90-16 Motorcycle Inner Tube 3.25/3.50-16 T4 Valve Stem* TR4 Valve Stem: Straight Stem, Round Shape to fit on rims with a round valve base. Fits on these Tube Type Tires: 3.25/3.50-16, 90/90-16, 90/100-16, 100/80-16, 100/90-16 Heavy duty durable valve stem. Unbeatable performance and value.