Rubber Master Tire Inner Tube with TR13 Rubber Valve Stem 15" 35x12.50R15 35x12.50-15 LT. Truck Fits Sizes: 35x12.50-15 35X12.50R15 Tube has Standard TR13 valve stem: Straight rubber valve, the most common stem style, measuring approx. 1.38" long and used in the standard size wheel hole of approx. 1/2" For Radial and Bias Tire Applications