Rhode gear flick-stand.
On a few long distance rides with roadies I have taken on my 85 team Fuji, several people have been interested when I can flick it down and lean the bike against anything without the wheel flopping. Its interesting because some of them want one, partly I think because they have seen it in action and its actually fairly useful, partly because they cant have one, as they wont fit their larger diameter or oddly shaped frame tubes, but mostly because they are not made anymore.

@ mdlthey I would love to see a picture of a flip down thorn sweeper for a mountain bike. I have several from the 70s and 80s that were made for road bike tires, but cant see them working for knobbies.