Mota Skates introduces their Premium inline racing chassis. Made of Aircraft 7075 T6 extruded alloy and machined to perfection. With high stencil strength and elongation characteristics The Boss responses with authority. No windows by design: We purposely designed the BOSS without any window cutouts. Improves aerodynamics as well allowed us to reduce wall thickness in areas to improve the elasticity / rebound speed of the frame with every push. Like premium inline race wheels, rebound means more roll, less stress on the muscles. No rebound and the wheels feel heavy and sluggish. Frames have similar characteristics. Meaning that a frame with proficient return reduces muscle fatigue. This holds true weather you skate indoor or outdoor. The longer the race the more the effect. Included: 1 Pair, 7075 T6 extruded aluminum frames, anodized black laser graphics, 8 axles, 8 self centering spacers, 1 4mm hex tool.