Mupo suspension is the result of over 20 years of research and development with passion and expertise on the race track. This precious know-how has gone from the paddock to the product range, produced and tested with care, piece by piece, in order to guarantee safety and high performance. These Italian made shocks feature so many adjustability options that one part number can be used on 2004 to present Sportster, 1991 to present Dyna, 2002 thru 2017 V-Rod and 1988 to present Touring. Just install, adjust to the correct length and set the spring pre-load to get the proper 3/4" (19-20mm) static sag and drive with comfort and confidence.