235/85R16 tires on 2005 31QBH - Will they fit?

Getting the CAT ready for 4000+ miles trip this summer and it's time for some new tires. After reading post after post about the advantages/disadvantages of 15" vs 16" wheels and load range d vs e tires, I plan to go with the 16" wheels and 235/85R16E Commercial T/A's. Before I spend 1000 in non-returnable new tires and wheels, has anyone tried this size tire on a 31 QBH series before? Mine is an East Coast Version 2005 31 QBH. If the 235's don't fit is it worth it to upgrade to the 16" wheels and 215/85R16E Commercial T/A's with a 2680lb rating?

I'm considering upgrading also but don't think I can fit the larger 16's under it so I'm trying to decide on which 16" tire. I was looking at the 225/75R16E since it is only 1" taller than my 15's which are rated at 2680lbs. The stock 15's that came on mine were only rated at 2600lbs. and the 16's woudl be a much better quality tire. Anyone else running the 225/75R16E size tire?

I have the 235's under my Wold Kitty and they work fine.