Rh71,

I suggest you mount your stock 19s at the back and check if the problem goes away. From what you describe, it looks like it is a problem at the back and not the front since your steering wheel does not vibrate. It should not take you long to swap them back and forth.

Let me know what you find out.

__________________
2008 BMW X5 4.8i/Space Gray Metallic/Gray Nevada Leather/Dark Burl Walnut Wood Trim/Sport Package/Premium Package/Cold Weather Package/Technology Package/Ipod and USB Adapter/Running Boards/Satellite Radio

Retired: 2004 325i Orient Blue/Sand Leather/Wood Trim/SMG/Premium/Sport/Navigation/Xenon/Premium Sound