Well, what about me going down to a 15 or 14 tooth in the back?

Yeah Veni, Im in the city and going short distances. For some reason, I just cant go slow on my bike. Im just used to hauling a$$ wherever I go. My road bike is out of commision right now, and its been some time since I rode it to even remember it.

Like I said, Im not so knowledgeable about the whole gear math stuff. Veni, what exactly am I looking for with that gear calc?