Ultima's new 39mm billet fork tube and slider assemblies can give your FX or XL model a totally new look for little dollars. Featuring our new hidden axle design the Ultima forks are made using high quality 6061-T6 billet aluminum lowers and centerless ground 4140 hard chrome plated steel tubes. The forks are designed to function in place of stock components and used with single or dual disc applications with an optional dual disc only bracket sold seperatley. Can be used with stock trees or our custom triple trees. These forks can be rebuilt using OEM stock components.