The Alloy USA Hub Conversion Kit is designed to upgrade and replace the non-serviceable wheel hubs found on 84-06 Wrangler and Cherokee. Now you can lock and unlock your front hubs to reduce driveline strain and improve fuel economy! The hub conversion kit includes a set of Rugged Ridge Manual Locking Hubs, outer Alloy USA Axle Shafts, 1/2 ton capacity aluminum internal mounting hub, U joints, machined front brake rotors, bearings, seals and hardware.... everything you need to upgrade your rig and prepare it for the trail. Maximum recommended tire size is 33 inch. Can not be used with locking differentials.