Chirp Wheels look like car tires, minus the hubcaps. Instead, the center is wide open, and has a mint green coloring that has been tested to support up to 500lbs. I didn’t test it up to 500lbs, but it worked just fine for my weight. To use them, I lie on the floor, put one under my back, and roll back and forth with my arms stretched overhead. I don’t really use the largest wheel, I prefer starting with the 10-inch and working my way down to the 6-inch wheel. Eventually, a pop comes, that sounds more or less like a four-by-four being smashed to bits by a karate master. It feels incredible.
The wheels come in three different sizes—6-inches, 10-inches, and a terrifying large 12-inch one. Each is padded with foam on top, making it surprisingly comfortable to lie on and has a little divot running through it perfectly-sized to fit in between your shoulder blades. Using them might seem intense, but it’s really no different than using a foam roller—you just get better results on your back.