Fly Sion BMX Bike 2018The Sion BMX from Fly is inspired by team rider Courage Adams and is fully loaded with great parts and innoation which we hae come to know and love from Fly. The Sion is built around a responsive full 4130 frame and is laoded with Fly signature parts like the Roey 2 Stem, Devon Smilie Tripod seat, Fuego tires and Ruben pedals. The rest of the parts are taken care of by Fly and Trebol and nothing has been over looked theres even 2x Nylon hub guards.