Our axle link tower has 3 adjustable position that can be easily changed form 4-1/4, 5-1/4, and 6-1/4 inches from the center of the joint to the top of the axle tube. In the future if you decide to change tire size this design simplifies the adjustment of your link suspension. This prevents having to cut off your old link tower in order to maintain proper suspension geometry. The link tower is incredibly strong, it is made form 1/4" steel and bent for rigidity. It also features a 1/4" weld in bridge plate. These are made to be attached to an axle with a 3-1/4 inch tube, but can easily be modified to fit other tube diameters.