Quick question: looking to get a new C59.
I'm split between frame sizes: either 54sloping or 52sloping.
My measures are: 179 height and currently using seat height 76cm (BB centre to top of seat).
I have 88cm inseam (which in theory equals to a 'theoretical' seat height of 77.9, but I feel it's a bit too high and feel more confortable on 76cm, maybe 76.5cm.
One last piece of info: I'd ideally look for a drop (top of seat - top of bars) of around 8cm
I know sizing a frame on a forum is no good, I should get a proper fitting done, etc, etc. but would also value your opinions: 52s or 54s? Also, feel free to comment on traditional geometries (so it would be either 56, 57 or 58).
Just a bit of extra info: if your inseam is truly 88cm, you can also ride a lower saddle. Technically, based on traditional fit calculations (not Guimard formulas), if you pedal heel down, your seat can be as low as 74 cm, depending on cleat/pedal/shoe sole stack height.
A good drop range for your body size is 7-8 cm, though you could have more depending on preference.
The 56 trad. or 52s should be fine, but you could also ride a 55 trad. if your seat were lower (which would also be good for your short torso).
76 cm seat height is pushing it on the 56 (more appropriate for a 57); would try and keep top tube to saddle top below 19cm for your body size (on a trad. frame).