Well unfortuantley i have had alil too much to drink tonight to help you but
tommorrow morning I will take some measurements that I have of a 38x 12.5 tsl mounted on a 15x8 wheel and a 15x10 wheel. but I can tell you that i really dont like the 12.5 wide tsl, looks way too small under a fullsixe blazer for my likes. when i get some new tires I am definitely goign to a 15.5 wide tire, better for mud for me and what not