The Yakima Sidewinder Tandem Bike Mount is a convenient one person tandem loading system with an easy swing out skewer arm. The Sidewinder firmly holds all tandem frame shapes more securely than a wheel-tray design, and easily holds any 9mm tandem fork using a stainless steel locking long-throw shewer with single side adjustability. Protects bottom mounted cables with unique padded boom cradle and quick release ratcheting straps, and is designed to clear hatches and flip up rear doors on most vehicles. Mounts equally well to round or square crossbars, includes handlebar strap. Full system security with SKS cores-sold seperately.