Question. I have a 2004 XE CC 4x4. I had bought a set of 18x8 centerline wheels for my Titan last summer. I put Kumho 285/60/18 tires on the wheels the first time. I had a vibration at 45mph and 70 mph. So the tire shop rebalanced them and the problem did not go away. So I ordered new tires, thinking this would solve the problem. They were the factory goodyear gsa 265/70/18. But this time I had the wheels and tires road forced on a Hunter machine, and everything came out good. So I knew that the wheels and tires were tru. But I still had a vibration at 70 mph. I called Centerline and told them what was going on, and they finally said that the wheels I bought were a two piece wheel, and that the tolerance in the foriegn trucks were tighter than domestic trucks. This was supposedly the cause. So Centerline agreed to buy the wheels back. So I bought a set of six spoke Le wheels from a TT member and guess what? The same vibration at 70mph. The truck rode great on the factory xe wheels and tires. Does anyone have any ideas or clues as to what may be causing this vibration?