Lisa, are you looking to stick with BFG's? If so then you'll have to go with their line of tires, if not you may be able to find a tire with a similar look and size to the tires that you currently have. If you do go with an 11.5" wide tire instead of a 12.5" wide tire you will only be losing 1/2" per side so it will make a difference on how they look, but not that much. Run outside with a ruler and see if you could live with losing 1/2" from how far your tires stick out.
What is the total size of your current tires (size and aspect ratio if it's listed on them....i.e. 285/60/R18)?
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