The Coyote Dual, Internal, Pneumatic, Boltless Bead Lock is a tire within a tire. It divides the tire’s air chamber into two separate compartments and thus has two valve stems. One is for the tire and the other for the beadlock. Think of the beadlock Case as a mini-tire and hence its parts are named the same. There is a Tread, two Sidewalls and two Beads. A heavy duty inner tube within the beadlock Case forces the Case to take shape and do its job. The inner tube is inflated up to 50 PSI and forces/pinches both tire beads against the wheel. On a 15 inch wheel, we calculate that there is over 4,500 pounds of force holding the beads against the wheel! This is in addition to the force required to pop the beads over the wheel’s bead bumps. Through a standard valve stem fitted with an Air Channel, the balance of the tire can be inflated or deflated to any pressure less than 45 PSI. Watch the video to see exactly how.

AUTOMATIC TIRE DEFLATOR COMPARISON Editor's note: The Coyote Automatic Tire Deflator is not included in this review since it was introduced in 2010, several years after this article was written. If you want to save some reading, go immediately to the underwater test video to see how all the pictured deflators turn ON and more importantly, turn OFF. Automatic tire deflators are popping up all around the world. They vary in size and shape, and some look virtually identical to the original Staunies (front and center). My objective was to see how they worked compared to the [...]