One New Replacement TR15 Tire Tube with Rubber Valve Core Fits: Farm Implements with a Rim Diameter of 16″ Technical Information: 6.00 – 16 Front Tractor Tube with Rubber Valve Core. This tube has a TR15 valve core. The tube also fits 5.00-16, 5.50-16, and 5.90-16 tires. Valve Core Width: .625″ Valve Core Height: 1.15″ Replaces Part Numbers: 55060016 Models This part fits: 6.00-16, 6.00×16, 600-16, 600×16 Reference Numbers: 55060016, 60016, 60016-A