Fit / Size: Designed to fit tire widths ranging from 325 mm up to 350 mm, with a 19-inch wheel diameter.
Valve Stem: TR-4 — a metal, threaded central valve stem suited for robust / heavier use cases.
Material & Build: Usually made of butyl rubber; thicker / reinforced construction to resist punctures and endure rough use.
Use Cases: Ideal for motorcycles (especially off-road, dual sport, or vintage) requiring a 19-inch inner tube in the 325–350 mm width range, with a sturdy TR-4 valve.
