I test rode a 56cm Serotta TI. My current bike is a 57cm Lemond. The Serotta rode great, but unsurprising felt cramped. I decided to have the seller take a short video of me riding it for secondary opinions.
I'm 5 11.5 (182cm)
View: https://youtu.be/oq0bIBXqgJ4
I'm 5 11.5 (182cm)
View: https://youtu.be/oq0bIBXqgJ4