This is a very clean Progressive rear shock. Will fit all R80ST models 1981- 1984 . This shock looks to be about a year old. The finish on everything is in excellent used condition. There are slight rub marks on the inner plastic sleeve. This is common from use. There are no signs of leakage. The spring is in very clean condition. Shock measures 14- 1/8” eye to eye. This shock would work on an R80GS also. It would lower the bike in the rear. An R80ST is a rare bike now as it was only made four years. Contact me with any questions you may have.