one possible cause is struts can be weak causing tire to hop up and down when hitting a bump in the road!! And also tire could be out of balance.
suspension
Could have hit a serious pot hole and damaged the tire.
If a tire were square, than it would be a dick.
No. Low tire pressure causes poor handling and poor tire wear.
An out-of-round tire can be balanced, but it may not resolve all vibration issues since balancing primarily addresses weight distribution rather than the tire's shape. If a tire is significantly out of round, it might be necessary to replace it, as balancing may not eliminate the problems caused by the irregular shape. Additionally, a tire that is out of round can lead to uneven wear and handling issues, making it unsafe for use.
The air inside the tire would continue to move the same as the water in a glass will still move after you stop stirring it.
Round Shape of course :)
Out of balance, bent wheel, defect in tire.
Usually it's caused by an out of balance tire/wheel. If that's not it, you could have a defective tire or bent component.
Exactly what it sounds like. The tire isn't perfectly round, and has become more egg-shaped. It can cause vibrations, howling/thumping noises, etc. These symptoms will get worse the faster you drive. You can try having your local tire shop balance the wheel (usually about $10), but if the tire truly is out of round then you will have to replace it.
If it varies with driving speed, look for an out-of-round tire. If it vibrates only when braking, you probably have a warped brake rotor.
tires