Comparing 'upright-ness' across several endurance road bikes I'm comparing the following endurance road bikes, all in 58cm or L:

BMC Roadmachine
Cannondale Synapse
Trek Domane
Look 765 Optimum
Specialized Roubaix

I'm 6'2&quot; and recently recovered from a herniated disk and hip arthroscopy. Given that, I'm looking for a geometry that is &quot;upright&quot; in riding position.
How can I best compare or measure 'upright-ness' between these bikes?
I know the basics: shorter reach + longer stack == more upright. But those measurements actually seem to conflict here, and I'm not sure the degree to which other measurements may counteract them. For instance, the Roubaix has the longest stack, but also a relatively high reach and the shortest head tube length. The 'best match' seems to very widely by different categories/measurements.
Is there a slightly more nuanced way to compare this measure between the bikes shown here?
You're almost there. You can quantify &quot;uprightness&quot; as the stack/reach ratio. Just add another row to your spreadsheet and insert that formula.
I'd say anything over 1.5 is pretty upright; down around 1.4 is pretty racy. You can compensate to some extent with spacers and stem length.