I think the main reason it's a Kumho is that the tire is an odd size 245/65/R18. It's not as wide as the regular tires (probably so it can fit in the well.)
When I was getting ready to take delivery of my Summit, I knew that the supplied Latitudes were not off-road tires (even though I was getting the Off-Road package
) so I started researching replacements. I even considered replacing the spare, that's when I found out it was a different size. Kumho is the only company that I found that made that size of tire.