From Team Yokomo:
The BD12, which is reminiscent of a racing machine with a low center of gravity, has a new aluminum chassis specification that is ideal for high-grip carpet roads!
A newly designed aluminum chassis that optimizes the slit position of the motor and lightening in the rear further lowers the BD12’s center of gravity, preventing high sides on high-grip road surfaces and increasing cornering speed. It is compatible with ATF (active top deck flex) and rear toe control, which increase the stability of the rear, and it is possible to acquire stable steering characteristics.
High-rigidity aluminum main chassis optimized for BD12 motor position. It is heavier than a graphite chassis, and it is possible to promote a low center of gravity. Of course, bevel edge processing is also applied to the slits, etc., giving it a luxurious finish.
Parts other than the main chassis are the same as the graphite specification. Since optional parts are also shared, chassis flex can be adjusted by combining with a soft type 1.5mm upper deck and a highly rigid brass center stiffener.
Combined with the shortening of the damper, it has become the optimum specification for high grip road surfaces.