I need some last minute info regarding snow chains. We're going to Lake Tahoe this weekend and I need to bring some chains in case CHP says they're required. I have a 2003 4MO Wagon with the stock all-seasons size 205/55/16. I read the manual and it says snow chains must only be used on tires 175/80/14 or 195/65/15 and for 4MO only on the fronts. Does this mean I can't use my stock 16's with chains? I don't have snow tires or smaller size wheels to put on so any suggestions? Being in CA, we don't go to the snow too often so I was planning on renting chains.