The issues less to do with spacer, but the ridiculous sizing.
For instance, their 50cm Cross-Check is longer than a typical 54cm bicycle.
A Genesis Croix de Fer in XS is actually shorter and taller than the smallest 42cm Cross-Check.
Moreso, a 54cm Cross-Check is longer than a 56cm Cross-Check.
Surly kept the old geometry because it work for them for the last couple of decades, but that was before Stack and Reach exist which show how poorly sized they are.
The issues less to do with spacer, but the ridiculous sizing.
For instance, their 50cm Cross-Check is longer than a typical 54cm bicycle.
A Genesis Croix de Fer in XS is actually shorter and taller than the smallest 42cm Cross-Check.
Moreso, a 54cm Cross-Check is longer than a 56cm Cross-Check.
Surly kept the old geometry because it work for them for the last couple of decades, but that was before Stack and Reach exist which show how poorly sized they are.