Turns out that my Paselas are 27 x 1 1/4 and the Michelin Bib Sport are 27 x 1. Those Paselas are monsters! On my Gitane SC I have 3/4" clearance between the Michelin Bib and the fork crown. With the Pasela it's about 3/8" @ 80 PSI. I like the Michelin Bibs, a very nice vintage tire.
HtH - Jim