Question: what is the difference between 4 ply and 6 ply tires?
Answer: The 6 ply tires actually weigh a little less than the 4 ply, while the load rating of the 4 plys is almost 40 percent lower. Also, the rated max inflation PSI is 50 PSI for the 6 ply as opposed to 31 PSI for the 4 ply tire. If you want to run your tires a little harder you may want to go with the 6 ply tire.