I have a '98 Jeep Wrangler, 4.0, auto, with 30x9.5R15 tires on it now. I'm looking to purchase new winter tires but can't seem to get a straight answer on the sizing. I want to retain the 30" height and 15" rim size while trimming a little on the width. First, how much width reduction is recommended? Also, is there a way to cross reference sizes to "pick" the suitable one while also keeping load capacity in mind (it's also my daily driver to school)? I'm a little hesitant to state I recently purchased a new plow by the "s" name but compared to my last plow and vehicle, the Sno-Way is a heck of an upgrade for me so I'm actually proud of it. Thanks in advance.