Inflating Tyres: Is it Possible to Make Them Lighter?

[Himal kharel]

a man tries to make a tyre lighter by filling air in it. is it possible?

 

[tiny-tim]

Hi Himal!

What do you think?

If you had a boat full of tyres, and you wanted to make the boat lighter (so it didn't sink), would air help?

 

[Phyreak]

when it is inflated, the volume increases but the air becomes compressed.
the net force will be
actual wt of tube+weight of air-upthrust
m(of tube)*g+V(of inflated tube)*d(compressed air)*g-V(of inflated tube)*d(normal air)*g

A density of compressed air >density of normal air so instead of being lighter it becomes heavier. So it is impossible

 

[olivermsun]

What about filling the tire with really hot air?

 

[Drakkith]

What about filling the tire with really hot air?

With an equal amount of air in a cold tire and a warm tire, the warm tire is SLIGHTLY lighter. But the difference is so small there is no benefit that you could get from it.