Interco must have just posted this info on the Truxxus as it was not there a few days ago, they have some nice 16" sizes available and they look like they run big. I think the 33x12.5x15 is now available as I have seen them advertised.
SIZE PLIES Width O.D. C.S. Rim Max
LT235/85R16 10 6.9 31.9 9.3 6.5x16
LT255/85R16 8 7.4 32.7 10.1 7x16
LT265/75R16 8 7.7 31.9 10.5 7.5x16
LT285/75R16 10 8.3 32.7 11.2 8x16
31x10.50R15 6 8.0 31.0 10.8 8.5x15
33x12.50R-15 Coming Soon
34x12.50R-15 Coming Soon
35x12.50R-15 Coming Soon
33x12.50R-16 Coming Soon
34x12.50R-16 Coming Soon
35x12.50R-16 Coming Soon
33x12.50R-16.5 Coming Soon
35x12.50R-16.5 Coming Soon
33x12.50R-17 Coming Soon