The most important feature of the wheel is the patented advanced bead retention system, which is designed to keep the tire in place on the rim and sealed at low air pressures. A small rib on the outer bead seat works by compressing the foot of the bead in a very small area. Eventually the inner bead will be modified as well. Even on lateral loading the bead bundle stays where it should. Other proprietary features such as the height and width of the seat help the bead stay put too.