Thanks for responding gggGary! Yeah if my memory serves me well, the shims are for anti-squeeling... even wear huh? Hadn't though of that but that is a good thing... when I order new pads I can get new shims too. Meanwhile, I am inclined to run what I have without shims, but it would be great to hear if anyone else has done that. I seem to remember lot's of bikes not even having the shims.