Originally Posted by
carleton
There is a big difference between 55cm and 58.4cm TT.
Measure the head tube length ("K" on the diagram) and compare it to the chart. That will let you know which frame you have.
It matches, 18.5. My concern is whether or not it is the correct size, but I guess I'll learn that once I'm on it. I just can't make sense of how I'm measuring 55 and they're stating essentially 58.5.