As the cranks turn, there is a linkage attached to a pushrod inside what would otherwise normally be the seat tube. That pushrod goes up and down inside the "seat tube".
If you look closely, there is a post on the top tube just forward of where the pushrod exits from the "seat tube" that you attach the saddle to.
That frame appears to be mass produced with the up and down function of the pushrod in mind.
What is the legitimate purpose of that?
I know how it's being used in the movie I grabbed the screenshot from, but I hesitate to believe that's what the manufacturer intended the design to be… Unless the ladies in foreign countries are way more open with their idea of… outdoor physical activity?
by BrianLevre
8 Comments
name of movie so I can get a contextual idea of wtf? It might be for a movie effect with no true value. I have never seen that – maybe a circus bike?
https://tenor.com/YKdS.gif
Watch the rest of the film and find out
I’ve gotta think that as much as this looks like it might have been mass-produced with the pushrod in mind, that’s a credit to a very good props department.
Any other real purpose this might serve (recharging a bike pump/compressed air for filling tires, powering an early electric lamp) is FAR more easily done a different way.
I think this is just a good job by the props department for the film making it look like this was a designed feature.
“obviously mass-produced”
I’m not sure where you’re getting this from. I can’t even tell how it would function from the screenshots.
Somewhere in the rust and debris in the back of my mind there was a bike with a build in air pump actuated by pedaling; e.g. turn the bike upside down, connect the hose, pedal.
Definitely want to build this now. Maybe a tandem for double the fun.
Hey, that’s my wife! I didn’t know she did commercials. ❤️