Promotional photo from O.N.C.E. team. Rider is Johnny Weltz. As you can see the post is not a Mavic.
Acording to the Bike Pro archives "The Mavic 330 is made in France, and is available in, 26.2mm, 26.4mm, 26.6mm, 26.8mm, 27.0mm, and 27.2mm sizes. ".
I remembered that they only made it in one size, but my memory it is not what it used to be...