Gege’s family in Paris during the German occupation (1940-1944) used public transportation (subway & trains) or bicycles throughout the four year occupation. No gasoline was available for automobiles, even though some private and commercial vehicles were converted to gazogene. The engines were converted to burning charcoal or compressed natural gas.
Gege went everywhere which her bicycle but locked it up if she left it parked on the sidewalk. One evening at a concert she didn’t lock her bicycle and it was stolen. Bicycles were rationed like everything else, so a replacement was expensive, if available.
Her father’s bicycle had replacement tires made of wood blocks wired together. Imagine how it would be to ride with wooden tires on cobblestone streets. With leather in scarce supply, shoes were made with wood as well.