It doesn't matter what it looks like. You are going to the track to run faster. I think the 15x8 will weigh less and probably be a better choice for a 26X10 slick. If you are running the ET Streets, then maybe you better go with 15x10. I am running 15X10 Weld Prostars on my car with the 26X10 slicks, but I didn't know at the time that they would have fit on a 15X8 wheel.