Features & Benefits 10/84 Gear Set made with 8620 Hardened Steel for 1998 to 2006 Harley Big Twin Models. DoesNOT fit 2006 Dyna Models. Reviews There are no reviews yet. Be the first to review “10/84 8620 Hardened Steel Gear for 1998-06 Big Twin Harley Models (Except 2006 Dyna)” Cancel replyYour email address will not be published. Required fields are marked *Your rating * Rate… Perfect Good Average Not that bad Very poor Your review *Name * Email * Save my name, email, and website in this browser for the next time I comment.