The Twin Y is an entirely new principle for truck suspensions which is not only lighter, but offers considerably improved handling. The design is based on a supporting arm comprising two interlocking sections made of high-strength steel, which absorb the forces exerted upon the vehicle’s rear axles in an entirely revolutionary way. This new solution reduces vibration and increases tire traction. Not only are steering, braking ability and driver comfort considerably improved, but Twin Y also significantly reduces tire wear. Similarly, Twin Y is also lightweight and sturdy, meaning that the suspension has a long serviceable life and low maintenance costs.