Current Projects chat and miscellany

Pretty certain. This is the clearance with a 700c.
I think it's just extremely tight geometry, no?
I just rode it down to my LBS to borrow some headset spanners, and he mentioned as well that the clearance between front wheel and down tube shouldn't be that tight.
But then he didn't know what 531 was, so lord knows.

It's optimum for a 19-23mm tubular, they are lower profile than 23c clinchers.