Progressive Suspension 465 Series Single Shock 309mm Fits: > 18-21 M8 Softail

12.6" (321mm) -12mm lower; Standard springs; Black anodized; RAP (Remote Access Pre-load). Great replacement single shock. Manufactured with a high pressure nitrogen filled black hard anodized aluminum body, with a large 46mm bore and deflective disc damping. Comes with Regular threaded or RAP (Remote Adjustable Pre-load) located behind the left passenger peg, for easy accessible adjustments. Rebound damping is 5-position adjustable. Available in stock, over and undersize lengths to accommodate the various stock Softail model lengths.