These off-set sprockets increase your gearing options and provide more tire to chain clearance than the stock sprocket. Available for all Sportster models 1984 to present including the late 4 and 5 Speed Evolution models. Must be used with rear sprocket spacer to bring sprockets in line, 3/16" (5mm) off-set. Note: Must be used with spacer ZPN720155 and oil seal ZPN022468 on 1994 thru 2005 models. Must be spaced-out on 2006 and later models.