Ive taken the info from this thread, done research, learned a lot and also have more questions than ever!
One key issue is that i have a flatbar hybrid that cube describe as "xs-50" (reach 389, stack 534) and so Im really unsure what size to get in a drop bar.

Generally, im looking for an endurance frame geometry, but something i can put decently wide tires on if i want so its going to be a gravel or cross bike.
For comparison, cube have gravel bikes also labeled "xs-50" with a reach of 383.9 and a stack of 529.8.

Comparing the two in my head tells me handlebars are closer and lower on the gravel bike, but i really dont know what that means.

Their next size up, labeled "s-53" has a reach 385 of and a stack of 554, a reach very similar to my flatbar, but a higher stack so, my thought process says ill be very upright on the larger frame size.


Can anyone advise the correct way to compare these numbers and sizes, when i cant actually hold or sit on any of the bikes?