Tires: Squeeking noise from tire?, douglas tires, target value

Question
I have a set of Douglas tires on my Buick Century, and they have just under 17,000 miles on them.   I just had them rotated, and now the front drivers tire makes a squeeking noise.  It sounds exactly like when you walk into a store with wet shoes.  It is the same spot of the tire every revolution, no matter the pavement type.  I tried looking at the tread and outer sidewall, but I didn't notice anything.  The tires are wearing unevenly like an out of alignment...but there are no symptoms of it being out of alignment.  The last set of tires all wore evenly.  It wasn't until these tires went on that the uneven wear started.  The main question is, what could be causing the squeek/squishing noise?  Thank you very much for your time!

Answer
Justin,

Irregular wear is caused by misalignment and aggravated by insufficient inflation pressure and insufficient rotation practices.

My experience says that the published alignment tolerances are too wide.  Not the target value, but the allowable deviation from that value.  I think it ought to be half of what is published.

Put another way, the alignment should be within the inner half of the spec.

You should be aware that even vehicles that do not have a pull can be out of alignment.  There are settings where one out of spec condition is offset by another out of spec condition – typically camber vs toe.  

Needless to say, hitting a pothole will cause the vehicle to go out of alignment, so just because the previous set of tires didn't have irregular wear, that doesn't mean the problem is confined to the tires.

But I don't think that has anything to do with the noise.

I have heard of some instances where the coating on the wheel comes off and the tire now rubs against the rim flange causing the noise.  Replacing the rims hardly seems worth the effort.