Best advice on buying 19.5 rims and tires

S Davis wrote:

I went with Toyo m608Z in size 245/70R19.5, they are noisy and had tread squirm for the first couple thousand miles. I have about 35,000 miles on them so far, with how they look I should get over 70,000 miles out of them. They do great in ice and snow and good on wet roads. If it was a truck that was a DD with part time hauling I probably would not go with 19.5s, I should note I run 3500lb Helwig helper springs and Firestone air bags and the truck is loaded to 10,800lbs.