I'm partial to radial tires that are medium width. 10.8 ideally. 10.5 is good too.
I arrived at that conclusion after using 9.5, then 10, then 11.3, currently 10.5, and want to run some 10.8, though I could be happy with for 11.2 or 11.3 wide. Those widths being approximations of course, since...