I've got a big race (Canadian National Championships) coming up this weekend and the conditions are looking like they'll be MUDDY! ...

I thought I'd revert from my normal tire combination to my bike's original Tires (Schwalbe Super Swans) on the bike's stock wheels, but now I'm worried about width, as the Super Swans are apparently 700x35 and this is the one race I do where UCI rules may be checked.

Does anyone by chance run this setup now and have a caliper to check what the actual width measurement of the tire is?