FWIW......Had a couple of new michelins put on the steering tires this past week and when I was leaving the garage lot I noticed a squeak sound with each rotation of the wheel.
At first I was told it could be brake dust from disturbing the axle when it was jacked up to remove the wheels.
To make a long story shorter......it turns out the chrome wheel covers have bolt holes a fair amount larger than the bolts and when the technician placed the covers on the bolts gravity of course took over and they rested off center.
As this places the rim of the cover tight against the rubber on the low side it naturally squeaks (especially on new rubber) each time it came around to the bottom side where the tire footprint bubbles out against the road.
We loosened the bolts on the jack and carefully centered the cover and then tightened two bolts (12 & 6 o'clock)
Tightened and torqued the rest and "voila" the squeak is gone.
Now this is not rocket science but it might be useful to someone out there.........whenever.