I totally agree with you, but I had my x4 off the ground and no weight on the tires, 22 psi instead of the 12 - 14 psi I'd normally run, one of the 27 x 9 has a noticeable flat spot, the other tires are fine.I have been a tire guy in my other life for many many years. Mailman was a Michelin dealer, goodyear dealer, firestone dealer, blah blah blah and I grew up in the tire business. Any tires that are bias ply nylon in the casing, will develop flat spots as they sit in one place, overnight even, particularly in cold environments. It takes a while for the tire to warm up and get rid of that slap. Tire dealers will tell you that Radial Play tires won’t do that… Bullshit. If the casing has nylon cord in it, it’s going to slap until it warms up, does it matter whether it’s bias ply or radial ply.