Set of six unmachined driving wheels for 7 1/4 inch gauge. Look pretty grim
but the muck is mainly on the surface and would shot blast off (or a wire brush
if you're feeling energetic).
Diameter over tread 10 inches
Diameter over flange 10 1/2 inches
Centre hole cored 7/8 inch
Boss suitable for 3 1/2 inch stroke