Ground Control HD2 Aluminum Frames in 60mm & 72mm sizes are an reinforced version of the original. The HD2 frame walls are thicker frames and stiffer - incresing overall strength and allowing for increased energy transfer, equaling more speed at the park and in the street. Countersunk axle holes help protect bolts from wear. Interchangeable plastic & aluminum h-blocks offer options for all kinds of obstacles. H-blocks will work on both 60mm & 72mm frames in all lengths. 60mm HD2 Frame 45.5mm frame height 41mm frame width 114mm middle wheel split Lengths: S=247mm M=257mm L=270mm XL=283mm * Length refers to the wheelbase - the length from the center of the first axle to the fourth. Anodized Black comes with silver aluminum block and white plastic block. Red comes with black aluminum and black plastic block. Each pair includes 8 steel axles with 8 - 8mm bearing spacers. Hblocks and axles are also available separately.
