Ground Control HD2 Aluminum Frames 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. Each pair come stock with both plastic and aluminum h-blocks.

45.5mm frame height / 41mm frame width / 114mm middle wheel split

Lengths: 247mm, 257mm, 270mm, 283mm

* Length refers to the wheelbase - the length from the center of the first axle to the fourth.

Each pair includes both 8 steel axles with 8 - 8mm bearing spacers.