Chinese private label. I think Nexen or Tri-Ace builds them. I pay the extra for Toyo.
That aside, a member on the GM forum is running them and seems to like em. I still don't condone though.
Question - Lexani Mud Beast tires | Chevy Truck Forum | GMC Truck Forum - GmFullsize.com
Lexani tires are crap. I put a set on my wife's Edge Sport. They were cheap, but had terrible road noise after 5k miles. Swapped them for Continental DSWs after 20k miles. When it comes to tires, you get what you pay for. Cheap tires are just that...cheap.