Originally Posted by DaveSSS

Unless you're buying your first bike, I don't see the point in comparing what you currently ride to some computer generated numbers. It's not difficult to compare your current bike's fit to a proposed new one and get a frame that fits nearly the same.

The output from this calculator proposes fits that cover such a huge range of possibilities that it's worthless. The seat tube range has nothing at all do do with the fit of a bike and it's totally out of date, with most modern frames having sloping TTs. What really matters from a vertical standpoint is the frame's stack height. The TT length is meaningless without a seat tube angle to go with it. It requires both to define a frame's reach.

In my case, the calculator proposed seat tubes that were much too large for my inseam and only the longest saddle height was what I really use. The calculator actually did come up with a reasonable range of TT lengths, but with no STA, it's meaningless, since the STA can change the reach by 10-20mm.