The ball joint adjustment shim for the Citroën 11CV is a crucial component used to ensure proper wheel alignment and suspension. These thin precision metal discs are placed between suspension components to adjust the angle and position of the ball joint, essential for stable and safe handling. They prevent uneven tire wear and enhance feedback and ride comfort, especially during steering. Specifically designed for the Citroën 11CV, a classic model known for its advanced engineering and smooth ride.