You can check out the load ratings on TireRack, but I have had great experience with the MICHELIN LTX M/S. The last a while, are very smooth, they are just an all around quiet and quality tire. I had the LTX A/T on my last diesel (GMC) and they were more rugged and offroaded pretty well, but I think a belt broke inside one causing the tread to become wavy and irregular, so I just put that one on the rear so it did not cause a vibration in the steering. But, I have had the LTX M/S (as well as other members of my family) on probably 7-8 vehicles with no problems at all, and smooth ride down to the tread bars.