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.
![17 inch RW TRD 1500](http://roadtraveler.net/wp-content/uploads/2012/03/17-inch-RW-TRD-1500.jpg)
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.
![16 inch FCJ TRD copy 1501](http://roadtraveler.net/wp-content/uploads/2012/03/16-inch-FCJ-TRD-copy-1501.jpg)
Copyright © 2012 James Langan