I am 52 years old and getting reacquainted with biking. I recently purchased a 1995 Trek 930 "Single Track" at a backyard sale as a good "first" bike. I am confused over the term "single track". When I google the term, it refers to mountain biking in a one-way direction as opposed to double track which, I guess, means mountain biking along a trail where bikes are going in both directions? Anyway, I assume that the term single track (or double track that appears on other Treks) has nothing to do with the bike itself. Is that the case? Can someone enlighten me?