I've had very bad luck with tires on my dually due to separation issues. I'm only getting 15k to 20k before this happens and 3.5 to 4 years. I only have the camper on the truck about 3500 miles a year...
I'll give serious thought to increasing the size to a 235. I did that once but was concerned it lessen the space between the duals,and I believe the small space now is causing excessive heat. Also wonder about clearance issues on the front..... Thanks