They aren't CRAGARs, they're SUMMIT. I have the same wheels (15x8) with 3.75" BS and I love them. I couldn't find any Cragars with 3.75" BS ANYWHERE, so I went with Summit's Steel 8. Glad I did. I wrapped mine in 33x12.50x15 Hercules Trail Diggers and two of the tire/wheel combos required NO weight to balance, and the other two only required 3 ozs each! That's incredible for steel wheels and mud terrains!
Enjoy your new shoes, man! Your Jeep looks great!