Quick question about BFG Radial T/A's

I've got Disc Brakes in the front, and Drum in the back. I'm going to stick with 14" wheels for now.

What do I need to know for the following to get the right wheel?
1.Diameter
2.Bolt Pattern
3.Width
4.Size?

If it helps, I'm getting 215/70R14 in the back(which is where the new wheels will be)