Ground Control HD2 Aluminum Frames in 60mm & 72mm sizes are a reinforced version of the original. The HD2 frame walls are thicker frames and stiffer - increasing overall strength and allowing for increased energy transfer. 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.  Available in Black and Red.  Each pair come stock with both plastic and aluminum h-block options.

60mm HD2 Frame - 45.5mm frame height / 41mm frame width / 114mm middle wheel split
Lengths: * Length refers to the wheelbase - the length from the center of the first axle to the fourth.

· S = 247mm

· M = 257mm

· L = 270mm

· XL = 283mm

Anodized Black comes with silver aluminum block and white plastic block. Anodized 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.