I currently am driving on 265/70R16 on my '04 Silverado reg cab 4x2. I live in WI. What size tires should I look for and can I put 17 in wheels on it? I can't afford new tires and 17 in ones are much easier to find. I have found some tire/rim combos reasonably priced but all are 17's. I am looking to get info on what size tire would be best. If I stay with 16's should I get narrower tires? Driving in snow is a major consideration. Any info would be greatly appreciated! Thank you!