Ns bikes movement 1 dirt jump bikethe ns bikes movement 1 dirt jump bike has a lightweight alloy frame featuring oversized tubes tight geometry and stellar looks stiff and responsive the movement 1 it is a great choice for advanced riders who spend most of their time riding dirt featuring quality forks solid cranks and sturdy rims it can take as much abuse on the track as you can give it and come back for morefeaturesframesetframe ns 6061 t6 custom formed and butted tubesfork manitou