Just a bit of followup.
The Vittoria Terrano Wets are infact labled as 700x38c, but also 622×40, basicly the same missmatch in labelling as the Schwalbe CX Comp’s that were coming off. Maybe its a difference between nominal width and the height (38 nominal diameter, but wider than they are tall?).
Anyway, once mounted on Stans Crest (older, non-mk3) rims the Schwalbe measure 38.5mm and the Vittoria 41mm (at 40psi, will measure again at riding pressure after leaving them overnight). Hard to describe the shape, it looks rounder than the schwwlbe but at the same time fills the fork a lot more so i think its taller too.
The gist being that they leave only minimal clearance in the back of my CAADX. I’d be happy on the road but not in mud. So the search continues for a budget 35-38mm wet tyre before the trails round here get too sloppy for the CX Comp.
Ohh and the Vittoria are seriously tight. One of the few tyres ive had to resort to tyre levers to get it over the rim, then once on had to inflate above the max pressure for the stans rim to get the bead to pop. I didnt even bother fitting it to the rear rim, just held the front wheel in place as I suspect getting them off may well involve metal tyre levers or a stanley knife!
