I plugged the numbers in to ye olde bike comparator. If it's 100% accurate, you'd need a 95mm -6* stem on a 5cm spacer to have an identical position to your current one on the CAAD8. If you went with the 50cm SLR01, you'd need a 100mm stem on 25mm of spacers. Of course, one test ride is worth a thousand internet comparisons. Good luck!
SLR01 53 (red) compared to a CAAD8 using the geo chart you posted:
thanks, but this raises a few questions:
'height at top of headset' would correspond to 'stack' , right ?
then from where is 'handlebar height with spacers' measured, also from the bb ?
is yes, then a 20 mm difference between the two is hardly possible if the stack height of a stem is 40 mm alone, then add a raise because of the upward angle
there's no spacers used in your calculation, right ?
where do we find proof that a saddle to handlebar drop of 110 mm can be achieved ?