Whenever you want to.
A bicycle alone only use up space. But a human riding a bicycle will have to use force to get the bicycle to do anything, by pushing on the pedals, pulling on the handlebar ASO.
Yes, it is possible to use a bicycle for towing a kayak.
A bicycle lane is a part of a roadway designated for use by cyclists.
For your bicycle chain, use a bicycle-specific chain lubricant to ensure smooth and efficient performance.
Examples... We both have bicycles. I have a brand new bicyle. He has an old bicycle. His bicycle has a flat tyre. My bicycle has good tyres.
A bicycle path is a path, segregated from other traffic, for the use of riders of bicycles.
Also known as a recumbent bicycle, a reclining bicycle is a bicycle you can use from a seated position that is lower to the ground than an upright bicycle.
Use a bicycle.
How much a bicycle what? Weighs, cost, take up space?
Use bicycle clips.
The muscle strenght of the rider.
When you need to inflate the tires.