Super-Flex lower fixed control arms for TJ Wranglers and XJ/MJ/ZJ (front only) Cherokees. All Super-Flex Control Arms feature our rebuildable spherical bearing assembly. This assembly features a large 2-1/4 Inch polymer race that encapsulates a 1-3/4 Inch hard plated steel bearing. A threaded steel insert allows adjustable preload and easy maintenance. The unit is greasable and extremely quiet due to the non-metallic races. This bearing allows extra flex for off-road prowess, yet does not sacrifice on-road handling or long term durability