I don't but I do have a great site that I used to see the difference when I put the 275/55 (2.5 inches wider than originals) on my wifes jeep. Gives you all dimentions. So you can see if they will fit. As far as ride, well, the width sure gave us better handling, and also took away some of the body roll. The site was dead on! I also used the site the site to upgrade on my Magnum also, and again, the site was right on the money! Hope this helps.
http://www.1010tires.com/tiresizecalculator.asp