I have a Fantom Cross UNO, and although on bikesdirect it says it fits 42 tires (WTF: wide tires fit), I noticed that it just barely fit a 38 in the rear. (about a milimeter clearance)
I can see how 42 may fit (Barely) in the front but the rear doesn't take more than 38 (4 less than what was claimed).
The vanilla fantom cross like you have doesn't have the WTF: wide tires fit feature, but it just goes to show you cannot trust what you read on the specs, measuring will be your best bet.
Last edited by lolitsJeff; 09-30-10 at 10:32 AM.