These upper control arms feature ICON's patented Delta Joint. The Delta Joint is a heavy duty high angle ball joint?that combines the durability of a ball joint with the performance characteristics of a traditional uniball.?While the industry standard uniball does a great job of allowing the control arms of a vehicle to articulate with little bind, they do have an inherent weakness that leaves more to be desired when used in a daily driven application - exposure to the elements. The Delta Joint features a zinc plated housing providing the first layer of corrosion resistance, while a tough grease seal keeps potentially harmful elements out of the inner workings of the joint. Metal on metal construction and a greasable design increase the longevity of the Delta Joint while at the same time allowing for noise-free operation.?What makes the Delta Joint unique is that it brings the best of both worlds to ICON upper control arms with features that make it more robust than a uniball, and at the same time capable of greater angularity than a typical ball joint. ICON tubular UCAs feature 1026 DOM tube construction, polyurethane bushings, and ICON*s serviceable Delta Joint, a hardcore high-angle ball joint that combines the durability of a ball joint with the performance of a traditional uniball. Recommended Aftermarket Tires: 33" x 11.50" (Larger tires may fit but fender trimming and modifications will be required.)