Closing the Wheel Gap without Lowering --- Help

[jeffreyd]

Ok, I'm finally sick and tired of the look of my X5 from the side. I have a 2002 X5 with 19" Rims and Michelin Diamaris Tires.

Rear Tire Size: 285/45/19
Front Tire Size: 255/50/19

I don't want to lower my X5, seems like a waste to me, rather I'm thinking of increasing the tire size. How much could I go? Has anyone had success with this to get rid of the ugly gap? Right now I'm pushing a 6-7 inch gap, looks horrible. Problem is I hate wasting these new Diamaris Tires (1k miles on them), I guess I could always sell them or save them. Please, any experience would be great, tire size?, brand?, reduced wheel gap by how much? Pics? etc.. would all be very helpful. Again, all help is greatly appreciated, I always like to know what I'm doing before I actually do it.