flboy, Howdy;
First question is, do you plan on using the same wheels/rims? Dexter has a chart on their site
regarding the depth of the 'dish' of the rim used and compatibility with the hub.
As you are doing this with a single axel you should be able to go to regular tire sizes as you
won't be dealing with the torqueing that occurs with dual axels when doing tight turns.
Just some 'things' to contemplate.
hank