A visual always helps. In these pictures you can see the circumferential raised lips, or beads, on a typical light-truck wheel which are often called the “safety bead”. They help the tire stay on the wheel. The first photo below shows a relatively new, 17 x 8-inch TRD Tundra wheel, but they are all similar. The safety bead ring is inboard approximately one inch from the actual tire bead seat.
Below is another example, a very well used 16 x 7.5-inch TRD FJ Cruiser wheel, which has had several sets of tires mounted.
Copyright © 2012 James Langan