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Rubber is actually somewhat porous. A few pounds a year are normal. The number one cause of air loss is usually rim leaks that cannot be seen. Spray soap water solution around the rim to see them. Most tire places will not clean the rim properly when they mount tires and rely on rim sealers that sometimes don't work. On an older car, the rims get rusted in the bead area and need sanding and buffing to seal properly.

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12y ago
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15y ago

Air pressure is caused when you pump it with an bike pump!!!!!!!!

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Q: Why do tires lose air pressure?
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Related questions

Can tires on your car lose air weekly in a hot climate?

In a hot climate air expands, causing more pressure, not less. If your tires are continually losing pressure you have a leak that needs to be fixed.


What is the characteristic of pressure loss in tires?

The tires go flat. The tires lose air even if they don't have any defects or holes, the air goes right through the rubber by osmosis. For applications where tire pressure is critical they use nitrogen to inflate them. One of the amazing things about air in tires is that different gasses depart the tires with different speeds. Probably a good science project in this.


How often do you need to check the air pressure in your car tires?

Owner's manuals usually recommend to check the tires' air pressure weekly.


How air tightness is achieved in tubeless tires?

air pressure


Why should you fill less air in the tires in summer?

No -- Keep the same recommended air pressure in your tires at all times, but check and add air when the tires are cool and have not been running. Use a tire pressure gauge.


What is used to meausre air pressure in tires?

A tire pressure gauge.


A taxi driver wishes to increase his fares by adjusting the air pressure in his tires. Should he inflate the tires at low pressure or high pressure?

Low pressure.


Why some air escapes from tires when you fill air in tires?

If air is escaping from your tires then you have a leak. Repair the leak and no more air will escape. This is not to say you never have to check the air pressure. Tires are made from a porous material and as such will loose a very small amount of air even under the best of circumstances. Check the pressure on a regular basis.


Air pressure for 15 inch tires?

76


When you ride a bike friction between the tires and the road heats the air in the tires What does this do to the pressure in the tires?

Air expands when heated so therefor increases the preasure


Tires air pressure?

It depends on the tire type and the load of the vehicle. Tire pressure is the amount of air in a tire that inflates the tire to the maker's specifications. For specific tire pressure on a specific vehicle, please look at the sidewall area, as most tires display the recommended pressure according to maximum load.


Why does Scion Car tires lose air weekly?

It shouldn't. There is something wrong with your tires. Probably a leak