I run bias ply as well. Mine came with the car and I have no idea how old they are, but they have lots of tread left. As for the hubcaps, I'll tell you the 'secret' Larry Barker told me. First, bend the ends of the tabs out so they are perpendicular to the pavement when the caps are installed on the car. Next, hold the cap in your lap in the position it would be in if it were on the car, i.e. straight up and down with the outer (convex) side pointing at your stomach. Now take pliers in your right hand and hold them parallel to your chest. Grab the end of the extension part of the tab, i.e. the metal part that connects the tabs that contact the wheel (the ones you already bent straight up) to the hubcap, with the pliers and pull up and slightly towards yourself. Rotate the hubcap around and do this with each tab. They should now all be bent slightly up and out on the right edge. I used to have hubcaps fall off, but have not once since I tried this. Sorry for the complex explanation, it would be much easier to just show you. If I get the time maybe I'll take a few pictures of myself doing it and post them. Good luck!