VintCo Air Shocks are an exact duplicate of the original air shocks so popular in the late 1970s. We have all sizes ranging from 13.5 to 17.5. Just like the originals, our air shocks are adjustable with two chambers, high and low pressure, giving you tremendous flexibility for setting your bikes suspension exactly as desired. No more trying to find unobtanium springs to match your weight. The VintCo Air Shocks come assembled and ready for installation-just add air or nitrogen. Remember, like the originals, some modifications may be required to install on your specific dirt bike (various bushings are supplied). These new air shocks are fully rebuildable with VintCo rebuild kits and all shocks are hand assembled in the USA. Includes manual and spacers with all new components. Find more tips, tricks, and specifications in Vintco's Air Shock Owner's Manual. Distance Center to Center 15.291 (inch) 388.4mm Travel 5.014 (inch) 127.4mm Collapsed Length 10.276 (inch) 261mm Warning: Shocks comes without air when shipped you will need to add Air / Nitrogen to set up sag properly. Pair of complete air shocks 15.125" 4 Cap Reducer Bushings 10x12x16.5mm VintCo Owners Manual Assembled in USA All new High Quality components Fully Rebuildable Customizable for many models Same design as 1970s Air Shocks 13.5-17.5" lengths available