Hey i have had this shock for a while now but dont really want to invest any money into it right now. Basically i got it from my friend who used to race cannondales back when and he had a few parts left over. So i was ganna put this on the glamis but i put it on and it seems like all the nitrogen leaked out, so my bet is it needs a quick rebuild. As far as i can tell its a dual rate shock setup for about 180lb rider and the system in the shock where it gets stiffer when getting closer to bottoming out has been deleted. Just trying to get rid of somethings around the house that i dont need to spend money on and this is one of them. Everything looks and feels good and it still has fluid in it just no nitrogen. I am really unsure what its worth but i would thing it would be worth more than a stock one which i thought sold for around $65 or so.