Most tires that you can get in white letter versions also come in a black wall version (like Ashmason said, actually two different tires). The white letter tires are usually a few bucks more than the black wall tires. There are some tires that only come with white letters and on those you have to turn them around if you want the black side out. If you take a close look at some white letter tires, it says "this side out" on the tire. I know the set of BFG Long Trails that I used to have said that.