Inner Tube 3.00/3.50-12 TR87 short 90&deg; metal stem (10 mm dia.) - Fits on 3.00-12, 3.25-12, 80/100-12, 100/80-12 Motorcycle Inner Tube 3.00/3.50-12 TR87 Valve Stem* TR4 Valve Stem: Centered, Straight Stem, Round Shape to fit on rims with a round valve base. Fits on these Tube Type Tires: 3.00-12 | 3.25-12 | 80/100-12 | 100/80-12 Heavy duty durable valve stem. Unbeatable performance and value.