Specially-designed 2WD/4WD right back tires with 12mm interior hex. The center countersunk area was in fact indeed redesigned to put the wheel nut more deeply. Precision fit, suitable for high-competition competition. Crafted from versatile, durable item to withstand effects. The medial side of wheel is aerodynamic for maximum performance. Unique highlights of the wheel are visible through inside: reinforcement ribs to really make the tires as stable as you're able to and expel deformation.