I am getting a high pitched squealing from my driver, front wheel / tire.
It sounds metalic. It comes & goes...at all speeds. It disappears when I
apply the breaks. Tire & wheel look OK. Disk is smooth, does not appear to
have problem. Just had all 4 tires replaced last month. I don't recall if
it was making noise soon after tire replacement or not.

Any ideas?

 

could be the squealer bar on the brake pad,
designed to rest on the rotor when the brake pad
wears down to a certain point. you have about a
week to get new brake pads installed if this is
the case, the sooner the better.

in another case, once I had a small pebble lodge
itself between the back plate and the backside
of the rotor, caused squealing only when I went
certain speeds, as well as in reverse. Of
course, I didn't know it was a pebble until I
pulled the whole bloody thing apart... lol

t