How much difference do you think it makes that the tires in this test are all rated at only 32 psi, yet,
all current tires in this size (215/75x15) are rated at higher pressures? Although a few are rated at 35 psi, the majority are at 44 psi, some at 50 psi, and some at 65 psi. I'm no tire engineer, but these pressure rating differences say to me that some advances may have been made in tires since this test was conducted, and the results may not necessarily apply to the tires that are available today.
