I am considering a CX bike but want to try a few epic road-fire road rides first to see how my mid-30's back will handle a non-suspension ride before I cough up $ for a cross bike. I have a Bianchi Campione and want to put some hybrid tires on it that will handle gravel roads and paved roads. I bought a 28 in a Michelin with knobbies, but it will not fit on the bike. Does anyone have any suggestions? I think the biggest tire is a bald 28, as someone suggested in a previous post.

Conti Ultrasport 28s are skinniest of the fatties.

I would just cough up on the cross bike though. Once you get some serious floatey tires on it, your back may react differently. Fit is very important.

Just saw these on Ebay: http://cgi.ebay.com/Vittoria-master-cross-700-27-cyclocross-tires_W0QQitemZ7178057307QQcategoryZ42334QQrdZ1QQc mdZViewItem