Most "D" load rated tires aren't as strong as "E" rated tires. This is especially true for a specific size. If you put a D rated tire on a vehicle that came with E rated tires, expect trouble legally if there is a blowout type tire failure that causes injury. In general "E" rated tires will also have a heavier duty construction which means they will handle the trials and tribulations of off road use better. Of course comparing across brands and models there may be differences that make some "D" rated ones stronger than some "E" rated ones, but that will be the exception rather than the rule.If you go from a "e" rated tire to a "d" load rated tire which exceeds your "e" rated value keep the load rate data in your records, not all "D" rated tires exceed "E" load rate so be sure before you create a liability for yourself.
I noticed this when I was looking for 15"x8" wheels for my Toyota mini-truck. All the inexpensive wheels were knocked out of contention due to low load ratings. All the other uses for the 5.5"x6 lug size didn't require as much strength as my '94 4x4 pickup needed. I personally like to have the wheel rating similar to the tire's rating so I was looking for a bit stronger than factory even, but that wasn't to be on any 15" rim. It took switching to a 16"x8" rim to get the minimum strength I wanted. There were heavier weight vehicles that used that lug pattern and rim size so the rims were available. That opened up allot heavier duty rims. It also opened up going to "E" load rated tires for addition tire strength. I figured that was good for Canada's remote northern roads which I heard were notorious at puncturing tires.Wheels have load ratings too, 5, 6, 8 lug wheels are not all created equal be sure when upgrading, upfitting, or whatever.
I've heard of a number of cases where wide tires were put on to narrow of a rim with the result being tire tread delamination at regular highway speeds even when the tire was properly inflated.
If you put a D rated tire on a vehicle that came with E rated tires, expect trouble legally if there is a blowout type tire failure that causes injury...In general "E" rated tires will also have a heavier duty construction which means they will handle the trials and tribulations of off road use better.
7" is the recommended minimum rim width for that tire size according to the "TIRE AND RIM ASSOCIATION" so, your rims are too narrow.
In recent years, improper tire to rim fitment has become a lawyers dream come true of big $$$$$$$$$ in litigation.