Ultra-light, ultra-strong eccentric top clamp for ball-bearing (without the necessity for composite hub), CNC-machined from premium Swiss 7075 T6 aluminum. Eccentric top clamps enable motion through the back axle 1mm ahead or rearward on the basis of the clamp orientation. A shorter vehicle rotates faster in sluggish corners and possesses now enhanced ahead traction. A protracted automobile is freer in high-speed corners and can feel more linear, especially during fast means changes. Also black colored colored colored colored coated for long life and trendy look. Identical left/right. Fits aluminum back bulkheads with fast & effortless journey height modification. Two pieces are expected for make. Fits X12 and X1.