We got a set of 38x15.50R18 TrXus STS tires. While there are bias-ply versions available, every vehicle in our stables has a license plate so radials are our choice nine times out of 10. The initial reaction was surprise at how light the tire felt (though it ended up weighing 98 pounds) for its size and how soft and pliable the tread compound and even the carcass seemed to be. Notice how much this tire is bulging at the ground simply under its own weight? We rarely see tires flex like that.