Flying Circus Dirt Jump Bike Hazelblue'n'ReflexThe Cube Flying Circus Dirt Jump bike like the name implies is. ready for take off!!! Whether you're at the pump track or your local dirt jump hangout, the last thing you need is to be worrying about your frame. That's why, with the Flying Circus, we applied all our aluminium frame building know how to make a chassis that's stiff, strong and perfectly balanced. A BSA threaded bottom bracket gives you a wide choice of crank options, while the jump