This is a hot one…
how much Chip?
What size Chip?
You can’t beat getting muddy with a hot Italian 
58ish…we are trying to figure it out, but it is not high on the list of things to do. I ride a 56 and it is just a tad too big for me (or I would keep it). We are taking offers as far as price goes. It can be had pretty cheap.
if you come across a 51cm please let me know! btw have you start switching to 11?
Searched Google and found a site that shows that bike. Their sizing chart only lists up to 56, which they say is the “effective seat tube”, but lists 59.5cm as “actual seat tube” and 56.5cm for top tube length. I’m 6’0" and race 'cross on a 56cm Redline Team (56.5 effective top tube), 110mm stem and Easton EC70 post with setback. Perfect fit for me.
The Pinarello chart has size 54 showing an “actual seat tube” length of 57.5cm. Wonder if that’s where you’re getting the 58ish from?
Search Google for “Pinarello CX Alu Cross Bike” and you should see Backcountry.com in the results. They list the bike with specs.
Good luck. 'Cross rocks!