Hi. I live in Kentucky, (barely any snow, at least in town) and I am slowly working on going farther, faster and carrying more on my bicycle rides. At some point, I am planning to work on my ability to travel to other towns and cities on my bike (one or more centuries) and I am going to need to upgrade my bike to handle any weather condition I might find (i.e. the levels of snow in Kentucky/Ohio in mid-winter) while my bike is loaded up with provisions and such for whatever trip I might be on. My bicycle is a road bike of the touring variety, and can handle 700x45c tires without fenders. I have a set of those tires with tread for wet conditions, and I have found that they do quite well in the rain. I am however concerned that I will need something significantly more for a country road with some snow/sludge on it. What is the widest size of tire that I am likely going to need year round?