Features a rolled rim lip for the custom look and detailed CNC machine work from the center of the hub to the edge of the rim CNC-machined from radial forged 6061-T6 aluminum for maximum road durability and strength-to-weight ratio Rim can be used on both front and/or rear applications when correct hub kit is installed (sold separately) Accepts Arlen Ness cartridge type hub Arlen Ness hub kit must be purchased separately to install.. RIM DRIFT BLK 21 X 3.50