Product information
*Even for the same vehicle model, it may not be possible to install depending on the grade and year. In addition, additional parts may be required for installation. For detailed compatibility, please be sure toHerePlease check further.
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The front and rear body ends are reinforced to increase torsional rigidity. The increased rigidity causes body vibrations, which are then damped with ultra-high-damping friction dampers, creating the best street-friendly ride feel with both strength and flexibility. Set of two front and rear.>&>Learn more
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The ends of the body are reinforced to increase torsional rigidity.
Motion control beam with built-in friction vibration damper.
For active driving enjoyment, the stronger the body, the better. This is because the body distorts when subjected to input from the road surface, hindering the movement of the suspension. Of course, mass-produced car bodies have evolved year by year, and while they are now rigid enough for normal driving, there is still room for improvement in rigidity to fully enjoy the sense of unity with the car. That is why we have been exploring the weak points of mass-produced bodies and have developed a lineup of products ranging from strut tower bars to full-scale brace kits, aiming for the perfect rigid body.
Aiming for further improvement, the team focused on reinforcing the front and rear ends of the body to combat twisting. Compared to the cabin in the center of the body where the monocoque is formed, the body is basically constructed of two "U"-shaped closed-section side frames laid out vertically, similar to the ladder frames used in trucks, and only reinforcements are provided. Furthermore, since this is also where the suspension is attached, which is subjected to heavy loads, it is more prone to twisting than the center of the body. Reinforcing this area would make it possible to create a stronger body.
We previously developed a product called the Frame End Brace. Its structure is completely rigid, with the L-shaped brackets fastened together with high-rigidity steel oval pipes. When combined with a strut tower bar and floor cross bars, this significantly improves torsional rigidity. However, as the body approaches perfect rigidity, it becomes more susceptible to minute vibrations from the road that cannot be fully absorbed by the suspension, tires, or rubber bushings. This tendency is particularly evident in the latest Mazda vehicles, which have high body rigidity.
To solve this problem, the Motion Control Beam (MCB) was developed.*1" While increasing rigidity to the utmost limit, in order to suppress minute vibrations, the parts that previously used steel oval shafts have been changed to ultra-high damping friction dampers. The interior has a simple mechanical configuration with disc springs and friction plates, as shown in the "Internal structure of MCB (conceptual diagram)".
First, body rigidity is ensured by the tension of powerful disc springs with a spring constant more than 100 times that of suspension springs. Then, from the stroke range where the body begins to vibrate, the elasticity and friction of the friction plates dampen the vibration. The stroke amount is only about 4 μm (= 0.004 mm) when a driver enjoying driving is speeding down a winding road (0.5 G). While this is a minute value that cannot be detected by measuring instruments, people perceive this difference as a difference in the "ride feel." This is why we continue to focus on "sensory tuning" that cannot be expressed in specifications. We are currently expanding our lineup with new items that combine strength and flexibility. We invite you to experience the effects for yourself.