I had the front end shimmy thing with mine on the origional Bridgestone and it continued on with the second tire which was an Avon. Turns out my front wheel needed to be trued, it might be something to get checked.
I run the Metzler 880 on the rear and as soon as I get a few hundred more miles out of the Avon on the front, I'm going to replace it with the 880 as well.
