SPC Performance 12-20 Tesla Model S / 16-20 Tesla Model X Adjustable Rear Upper Control ArmsFix rear tire wear issues on Tesla X and S Models with this rear camber adjustment arm from SPC. This billet aluminum arm features a rubber bushing on one end for low Noise, Vibration, and Harshness (NVH) and an xAxis sealed flex joint on the other for precision handling. The arm is easily adjusted while installed in the vehicle and allows 2. 0 of camber adjustment to dial in alignment settings. Sold each, order two to service both sides of vehicle.