I have a stock 2009 JK with the standard 255 75 17 tires. I am going to purchase some winter tires since I just picked up season passes to Breckenridge. With that being said, would you guys recommend staying with the 255 75 17 or can I go with a 245 75 17 (is going smaller a good idea)? If anyone has recommendations about brand and style for winter tires I am willing to hear what you have to say! Just wanted to say thanks in advance for the help!