Thanks, Hummer, for that info about light-weight Apollo models. I'm not the only one who wondered what all there was--clearly, many models. You list several in each of three categories. If they all have CrMo frames, what are the differences among these categories? Frame dimensions? Wheelbase? In which one would Triathlon fit? I'm guessing 'speed'; I was told when I bought it that it was a racing model of Apollo.