The 55 had a pretty long headtube, you could make the 53 work with a ~120 stem, it would also balance the relative heaviness of the frame.
Only 54cm effective top tube though. I ride a 120 on a 56. I'm not buying a 140mm...
54cm top tube is only an fsa slk away from 56.5
@PhilDAS started
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The 55 had a pretty long headtube, you could make the 53 work with a ~120 stem, it would also balance the relative heaviness of the frame.