Also, for what it's worth, I should note there is likely no way to run something bigger than a 32 with a fender on the WT in my opinion. A tire bigger than 32 will fit in the frame, but a fender over a larger tire would likely create a serious toe overlap issue and may not even properly fit between the tire and the brake. That pretty much rules out studded tires and a front fender on this bike. I think this is probably true on most bikes that run long-reach calipers, however. Cantis are definitely the way to go if you want to go big and use fenders.

By the way, I would give my left pinky for a Surly Pugsley. Such cool and unique bikes. If I lived near a frozen lake or some nice xc skiing trails, I would be all over one of those for snow biking and winter commuting.