Well, I'm researching tires for my trailer and I found tires 205 75 14's D rated 2250 lbs. @ 65 psi, that's great. I'm now running C rated 1760 lbs or so @ 50 psi. Now, I've been looking at Aluminium wheels as well, and noticed that they have ratings too! some are 1600lbs and some go to 1900...