Cigarettes were marketed as actively healthy and good for the lungs. They used doctors to sell them. And wanted everyone to know that the only reason that smokers kept dying of lung diseases is because cigarettes are good for lungs so of course people with bad lungs were smokers. Duh.

When Cigarette Companies Used Doctors to Push Smoking

Those aren't tubes, they're whole tubular tires, essentially an integrated tube and tire in one unit that is glued to the rim. Changing a flat first required peeling the old one off before the new tire could be stretched (they fit tight!) onto the rim.

Tubulars are still used regularly by at least one world tour team (French, naturally), but these days a flat is fixed by swapping the wheel or even the whole bike for a spare carried by the team car. That wasn't allowed in the early days.

I've known two respiratory therapists. They spend their days working with people suffering from emphysema and other smoking related ailments. Both of them smoked.

People are weird.