Since the weight of the vehicle is compressing the tire?
2007-06-20 15:14:53 · 8 answers · asked by frogster99 2 in Cars & Transportation ➔ Maintenance & Repairs
Yes.
Think about it. Take a balloon. Fill it up so that it is soft. Now squeeze it. The pressure will increase. Same goes for a tire.
2007-06-20 15:18:57 · answer #1 · answered by Enrique 3 · 0⤊ 2⤋
Shooter's answer is on the money. Boyle's Law says that the pressure of a gas is inversely proportional to it's volume.
When the weight is on the tyre it deforms and allows a redistribution of air within the tyre. In this way the volume is not changed and therefore the pressure remains the same.
Charles Law is similar to Boyle's Law but incorporates the temperature of a gas as well and basically states that temperature is directly proportional to pressure and inversely proportional to volume. In other word as the temp rises so does the pressure and the temp goes down with an increase in volume and vice versa.
As wheel rotates the constant deformation of the tyre generates heat and therefore the pressure will rise even though the volume is the same.
2007-06-20 16:17:01 · answer #2 · answered by Jules G 6 · 1⤊ 0⤋
The amount of air pressure in the tire remains constant on or off the vehicle.This applies to any amount of weight on the tire also.Although a tire that is hot will have a slightly higher pressure than a cold tire due to the expansion of the air inside the tire.
2007-06-20 15:20:54 · answer #3 · answered by ? 5 · 2⤊ 1⤋
Sounds like it would, but I think it stays basically the same. The weight may compress the bottom of the tire, but it may expand in other areas like the sidewalls or the top of the tire.
2007-06-20 15:19:25 · answer #4 · answered by Fordman 7 · 2⤊ 0⤋
I believe it DOES have *slightly* more pressure, but so insubstantial, that it would take a highly calibrated device to measure it. I doubt it'd move one pound of pressure on the gauge between car weight on, and car weight off. I could be "off" on that, but when I've checked tires taken off a car, and put back on again, there is no registerable difference.
2007-06-20 15:22:13 · answer #5 · answered by Anonymous · 1⤊ 1⤋
Yes because of the weight of the car. Even though the tire gage reads the same you have to consider the weight pressing on the tire as well.
2007-06-20 15:21:05 · answer #6 · answered by Steven D 7 · 0⤊ 2⤋
this question always baffled me. i worked in a tire shop for about a year and say i put 35 lbs of air in a tire then mounted it, let the car down, checked it again, and it would still be 35 lbs. i dont know why that is but thats my experience
2007-06-20 15:22:25 · answer #7 · answered by Shooter 2 · 2⤊ 0⤋
yes it does because of the weight of the car,but it will still read 32 pounds if you put 32 pounds of air in it,but that's why they produce a slight bulge in them when their on the car,but some will say there is no difference ,but there is,good luck hope this helps.
2007-06-20 15:21:07 · answer #8 · answered by dodge man 7 · 0⤊ 3⤋