My 12 bolt recently blew up so I now have a 14 bolt FF to install. The tires I was running on my 12 bolt have 15" rock crawler rims. I know I need either new 8 lug rims or buys some 6 lug - 8 lug adaptor / spacers. I perfer the buying new rims but have a few questions. I understand that 15" rims will fit over the large 14B FF drums. Is this true, do I need to worry about back spacing on a 15 inch rim on a 14 bolt FF. With that said, I talked to the "evil" 4WP guys and they mentioned they could have rock crawlers made to any spec. So now that I can pick my back spacing I was thinking about trying to use this back spacing to make up for the 2" of difference in the front and rear axle. With my front 6 lug wheels having a 3.75 inch back spacing I figure my rear tires will need a 2.75 inch back spacing to make up the 2 inch difference and that might also help out with any 15" rim / 14B FF problems. Am I on the right track? .... any thoughts or comments?