Pro Comp's UCAs have a uniball joint, so there's little to actually wear. The real benefit of the UCAs in this kit is to give your truck's front suspension more travel, since the uniball joint won't bind like the factory ball joint and the UCA won't contact the spring under full articulation until farther in their droop. If you're not going to be doing much off-roading or putting your front suspension under full articulation, then you'd likely be better off with the Fox Stage 1 Kit.