Nothing, an automobile tire is a pneumatic tire.
A tyre being pneumatic simply means that the tyre is air-filled, as opposed to solid, or filled with something else - meaning that almost all car tyres are pneumatic tyres.
1895 - Michelin introduces pneumatic automobile tires (straight out of wikipedia) btw tires in those days were improved design from those used on bicycles not invented
difference between a/s and a/t tires
In 1895, André Michelin was the first person to use pneumatic tires. those make the ride smoother.
pneumatic
the difference between LT and P tires” Topics: Tire Rack Wholesale
Good question. First you should understand that not all tires do, many are solid, some have nitrogen instead of air. Automobile tires were once usually solid, but the pneumatic tire (tyre) was a far more comfortable ride, and it was lighter and cheaper.
Air
It is probable that tires were invented soon after wheels because the people who invented wheels soon found out it was a good idea to have tires on them which could be replaced when they wore out.Well before pneumatic tires were invented, tires made of wood or iron were fitted to stone, wooden or metal wheels to make them last longer. If you don't have a separate tire, the whole wheel has to be replaced when its outside edges get chipped and worn away.If this question is asking about pneumatic tires then search for questions and answers about pneumatic tires, not just "tires".
ones bigger ones smaller
The rubber it is made if reinforced is friendly to the environment
In 1888, a Scottish doctor John Dunlop invented and used the first pneumatic rubber tire on bicycles.