Imagine a bicycle which can be left almost anywhere with minimised fear of theft.
Today’s invention is a new form of bicycle lock.
The seat post is hollow and connects to the pedal axle which has a diametric hole through it. The seat too would have an aperture created in it.
A chain with a hook on the end is dropped through the seat and seat post, emerging through the pedal axle. The hook is engaged with a metal loop of which there would be many embedded in concrete around an urban area.
The end of the chain emerging through the seat would be tightened and locked in place.
This tension would hold the bicycle upright.
It would also make it very difficult to remove the frame or the seat.
Even the wheels would be impossible to remove because they would be pinned down to the concrete by the chain.