Part Number: 18-0366 UOM: 1 - KIT Summary:Kit includes a 84 tooth ring gear with mounting hardware, and a 10 tooth pinion gear. This ratio allows more RPMs for easier starting. The heavier teeth configuration is less susceptible to wear or breakage by converting the 102 tooth ring gear to 84 tooth. Fitment: FXD 1998-2005 FXST 1998-2006 FLT 1998-2006 FLST 1998-2006 Measurements: Inner Diameter: 6.61" Country of Origin: Imported