i picked this up from a friend who also had this frames cannondale step brother (John Stenning on the top tube) like a lot of the stuff i have it was just too cool to pass up it! as far as i can tell its a 560 pro series from 84 or so i dont think im going to do anything with it it doesnt exactly have room for the tires i prefer to ride but like i said before too cool to not pick up ive tried looking John Stenning up a few times with no avail