Inner Tube 2.75/3.00-16 TR4 Staight Valve Stem - Fits on 80/90-16 | 80/100-16 Motorcycle Inner Tube 2.75/3.00-16 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: 2.75/3.00-16, 80/100-16, 80/90-16, 90/90-16 Heavy duty durable valve stem. Unbeatable performance and value.