Boardman Team Carbon Vs Bianchi Sempre Reparto Corse (Full Carbon)

I'm 5'11 but long-legged apparently 88cm. 230Lbs. mid 50's.
Normally use a MTB, but looking for a road bike. Tried these two - thinking of The Boardman as my pick, but described as "Medium/Large sized frame ", but when I asked him to tape measure it he tells ms its 52cm which seems way too small (we did not have a tool to adjust the seat when I rode - but it rode pretty nice, seemed a comfortable ride, and like new. I also tried a 54cm trek - That felt small even with the seat very extended.
The Bianchi was not in as good condition as the advertised photo but seemed pretty fast - perhaps not as smooth on gear shifts. 57cm.
Any quick advice is very welcome - bikes selling fast!


Normally use a MTB, but looking for a road bike. Tried these two - thinking of The Boardman as my pick, but described as "Medium/Large sized frame ", but when I asked him to tape measure it he tells ms its 52cm which seems way too small (we did not have a tool to adjust the seat when I rode - but it rode pretty nice, seemed a comfortable ride, and like new. I also tried a 54cm trek - That felt small even with the seat very extended.
The Bianchi was not in as good condition as the advertised photo but seemed pretty fast - perhaps not as smooth on gear shifts. 57cm.
Any quick advice is very welcome - bikes selling fast!


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Probably an inaccurate measurement on the Baordman. If this helps, I had that same model Boardman in a medium (which was a little big for me), these are the geometry figures for it, which I recorded from the website at the time:
Top Tube 555
Seat Tube 530
Head Tube 160
Head Angle 73°
Seat Angle 73°
Chain Stay 410
Fork Offset (Rake) 45
Bottom Bracket Drop 68
Stack 562
Reach 390
Marin Nail Trail
Cotic Solaris