The two wing nuts apply the clamping pressure on the band which holds the tire down. The band is just a piece of 1/8" X 3" wide aluminum. The two pieces of all thread have a nut and washer on either side. They're not tight here. Just finger tight and require no tools to remove. The wing nuts are what apply the pressure downward on the band and ultimately the tire. To remove we just take off the two wing nuts, and pull the pins on either side. That's it.