It's a gas.
gas
Air in a tire is compressed air. Compressed from the weight of the vehicle and against itself in the tire.
air is neither liquid or solid, it is a gas
Solid (such as metal) Liquid (such as water) Gas (such as air)
the buoyant force of the liquid on the solid is more than the buoyant force of the air on the solid.
Most small (indoor) fork lifts have solid tires and can not be filled. Larger ones can have a regular tire filler on the inside or outside of the tire just like a car.
It is a solid
No, it is a solid.
gas
its neither. Air is a gas
scalar
In short, yes the air does rotate. You're wondering if one molecule of air at the top of the inside of the tire will stay stationary when the tire is moving, basically. Because of the high PSI in a tire, the air molecules are packed together and do not have anywhere to go. When the tire spins, the air doesn't have anywhere else to go, so it starts spinning with the tire.