You're a racer, all your bikes are made to go fast, and you want to get your child into the action with you at a young age? The PeriScope Hammerhead is the tandem for you! Super-light Co-Motion design ACMUltra7, zonally-butted 7005 aluminum frame. Designed to perform, versatile enough to fit young child rears into adulthood. New for 2010: Race-level components for competition or fast-paced fun