Fix-a-Flat kits work on a very temporary basis. A punctured tire should be replaced.
A flat tire can lead to reduced tread wear and sometimes blowouts.
A tubeless tire can get punctured but air will leak slowly.
I recommend a highway tire for your best gas mileage. The strength of a tire is referring to the tread size, the larger the tread the larger the tire. Hence, the less gas mileage obtained.
Two things could cause the tire to make a noise sounding like a flat tire even though the tire is fully inflated. First, if the tire has a big enough flat spot on the tread surface and second if the radial plies in the tire have separated letting air between the belts causing patches of the tread surface to bulge.Answeri test drove a geo that had loose lug nits on it that made a noise like that
I believe you mean Run-flat they are tires that are designed to maintain the air pressure if the tire gets punctured but they only last for a certain amount of distance(depending on tire model)before they deflate
most likely popped tire belt feel tire tread with flat palm slowly carefully for noticeable dip or bulge in tire tread if you feel anything noticeable then the tire has lost a steel belt inside junk. it happens.,..
It is an indicator of tire tread wear.
punctured
it shouldnt have flat points and should have the same amount of tred left at every point
Quite possibly you have tread separation. The outer layer with the tread pattern is separating from the core. This is a serious problem, you need to replace the tire.
There would be no detectable difference.