Long ago, wheelers learned that lower tire pressure improves on trail performance. And, lower tire pressure also added a risk to the trail ride -- the risk that tire and and rims would separate. Keeping tire and rim together lead to the development of “beadlocks”. Staun Products provides a a new design in beadlocks.
Light weight and easy to fit, the Staun internal beadlock are touted to be easy to install and more reliable than other types of beadlocks and do not affect the balance of the tire.
First, you need to determine if your rims are acceptable for the Staun internal beadlock. Acceptable means one piece alloy or steel rims. And, even if it is a one piece rim, there may be a structure issue that makes a particular style of rim a bad choice.
The internal beadlock is a tire within a tire. One hole is required to be drilled in the rim for the valve stem of the inner tire. And, it requires a flat surface that is parallel on the inside and outside in a location that does not interfere with the brake assembly.
My rims fit the basic criteria, one piece alloy rims. With this in mind, I headed to the mechanic for installation of the new Staun internal beadlocks. It was time to break down the tire and locate the one hole to be drilled.
The instructions are ordered with a clear description how to accomplish each step. Most important is proper location of the valve stem hole; 6-7 inches clockwise from the valve stem and as close to center as possible. Once the hole is drilled and smoothed and the rim cleaned, it is assembly time.
The internal beadlock has three parts; inner tube, beadlock, and air channel. Assembly requires that the tire must be on the rim with one side of the tire bead off the rim. Next comes the beadlock, again with one side on the rim. Then the inner tube can be inserted. Then the second side of the beadlock can be pulled over the rim.
Now comes a critical part of the assembly process. The beadlock has a counter-balance weight that must be located directly opposite the original valve stem. Next in order is the air channel. It is a new valve stem that replaces the original valve stem. And, it must be positioned to provide an air channel to inflate the tire.
Once the inner tube is inflated, it will hold the beadlock against the internal side of the tire beads. That pressure will hold the tire on the rim which means the air channel must fit between the beadlock and the tire rim to provide a clear path to inflate the tire.
Starting with about 10 psi in the inner tube to bring the bead lock into contact with the tire rim and finish mounting the tire on the rim. Inflate the tire to set the tire beads. Once the beads set, delate the tire and inflate the beadlock to full pressure, 40-50 psi. Then, the tire can be inflated to desired pressure.
After the tires have been installed, the air pressure of the internal beadlock and the main tire should be checked after a few days to determine if there are any slow air leaks.
Work was done by:
Roger Daniel's Alignment & Brake
8517 Ablette Road, Shop F
Santee, CA 92071
BAR # ARD214109