OBS 285/75R16

[ekfinn]

Hey guys, currently I'm running 265/75R16 load range E studded snow tires that I HAVE to get off the truck before some bored law enforcement officer will notice. I got a slamming deal on some Cooper Discoverer ATR's, and I was considering going with the 285/75R16 in a D load range. This means the tire can only be filled to 65 PSI max, but has only 100 lbs less load carrying capability per tire than the E load range (3300 lb vs 3200 lb).

Now, considering that later this year I'll be putting a 900-1000 lb welding machine on the back of my truck, do you think these will hold up? My friend has a gasser F150 with a heavy-duty suspension from the factory and a greater GVWR than your average 150, and he's been running Cooper Discoverer ATRs in a D load range for over 50K, beats his truck like a red-headed stepchild, and always has the thing FILLED with firewood or some other heavy load, and his 17"s have really held up. I am also concerned about towing. How does dropping to the D load range effect my towing capabilities when I'm only losing 200 lb of rated load on the tires?

Input/advice much appreciated.