Im sorry cheetah, but I dont understand your logic? You want to fit bigger tires on your vx without a lift, thats fine, but changing the rim size isnt gonna provide a bigger fender well to put big tires in? In fact it will make the tire smaller and the rim bigger?
I believe you are correct that 265 is the biggest that will fit without a lift, but the outside diameter will be the same on a 16 or 17" rim, plus you have to buy new wheels?