I would be careful of using reach as your comparison. Use effective top tube too. Given how steep seat angles are getting, the reach is getting much longer (as the bottom bracket effectively mover backwards) but top tube staying the same or even effectively shrinking dire to slack head angle (depending on hoiw many spacers under the bars...)Making genuine enquiries about a Sight A2 for my lad. Frame and wheelsize are doing my head in. His 2019 Sight is medium, he is at the upper limits of it's size but still a good fit. New Sights have gone up a size. So do I go another medium, or large... the large reach is longer than my XL Range, so current thinking is a Medium.
Then wheelsize.... he is currently on 27.
Thinking stay with that. But 29er koolaide...
What do the cool kids think?