What a great picture, thanks for posting it.
(A photo of a young "Smokey the Bear" before he shaved. )
That rail is awfully close to the edge.
Hope they've got 3:1 or higher gears in the rear.
and them flanges are really short, a good bump or road kill and over the edge you might go!
Standard flanges, but I will admit the wheels are a bit small in diameter, just like the ones we put on '23 in Portola. You don't want to go too fast anyway--you think the road brakes are bad, try the rail brakes--metal on metal!