Castor is the angle to which the steering pivot axis is tilted forward or rearward from vertical, as viewed from the side. Castor is important for vehicle steering response and stability. When a vehicle is lifted, the castor angle is adversely affected because of the change in the angles of the front radius arms. Tough Dog provide a range of products to adjust castor from two degrees through to seven degrees to ensure a reliable straight steering feel is maintained at any lift height provided in the Tough Dog range.