Ritchey geometry - M vs. 55 etc?- 2024 edition

[mass_biker]

I reliably (2 road logics - 2017 and 2020) run 55cm geometries on these…which generally translates to ~56ish TT +/- for standard rim brake builds. If memory serves me right, one of my RLs has a longer stem and the other a slightly shorter.

As I try to make sense of the new gen (2024), I realize that the sizing is M or L etc. on their breakaway rim brakes.

Anyone with first hand experience on how these match up to the standard cm measurements?

Anyone with first hand experience in building up any of the 2024s?

Thank you!
MB