Those who are fully powered on the pump track or passionately honing their dirt jump skills need to rely completely on their bike chassis. That's why we brought all our expertise in aluminum frame construction to the development of the Flying Circus. The result is an extremely stiff, robust, lightweight – and perfectly balanced – construction. BSA bottom brackets allow for compatibility with many different crank options. Genius: Thanks to the jump-ready geometry with short chainstays, you always maintain full control over your bike, no matter where you are.