I love my peregrine falcons, kinvar, speeds and rides. I needed trail shoes for long runs. The Peregrine Falcons are great but I need more under the front foot for 10 miles. Login to Xodus 10. At least I thought so. While I appreciate the light, durable, and springy midsole, I found it very unstable when running on trails. I've rolled my ankles multiple times with them in just a few runs. I was hoping that this would be my shoe for the coming 50km. nope I am very disappointed and now afraid to wear them while running.