When I ordered my Vincitore, I specified I would run 28mm tires with mudguards. I HAVE run 32mm with the same 'guards, and with careful adjustment it all worked, but I prefer the ride with 28s. I initially used old Dia-Compe BRS 300 calipers, but then switched over to pair of Shimano RSX or something similar, 47-57mm reach, that the LBS had in its display case. Fender/tire clearance works pretty well with this set up, as I learned a few years back when I did rides like these -
Internal Detours: mud, sweat and fixed-gears,
Internal Detours: too much rain for roadside tea -
I love this bike and I have to find more time to go ride it!