I am impressed that you found those numbers! And your understanding of frame geometry is also impressive, Sheila.

I agree that it would make sense to try the Checkpoint in a 52. When I go back to the LBS to pick up the Madone with the new rear wheel, I will see if they have one in stock.

I don't actually have a Domane, I was just looking at one as an example of current frame geometry being very different from older bikes, and had thought about getting one when I first started looking into the current Trek offerings.

Thanks!