Lurching 40 to 50 mph slight hill

[Dave LV]

Goodyears were balanced twice by Discount Tire and three times by Hummer dealer. Made no difference.

Perhaps the thicker tread allowed the tire to absorb more the rotational jerkiness?

Or perhaps the tire is much heavier and the rotational inertia damps out the drivetrain? Hmmm. How to ADD weight to a wheel is something I have never seen written up before.