Harley-Davidson owners have a common passion for the open road and adventure. Most Harley-Davidson riders would agree with the Harley-Davidson marketing slogan that " There's nothing like the experience of riding a Harley® motorcycle." What Harley riders don't know is that the National Highway and Safety Administration has investigated Harley for potential safety problems. Critically, the NHSTA opened an investigation that lasted several months concerning the so-called Harley wobble.

There have been numerous reports of what is commonly referred to as the "high-speed wobble" (or "tank-slapper") accidents involving Harley-Davidson motorcycles. High speed wobble motorcycle accidents typically involve shaking or instability in the front end of the motorcycle when traveling at high speeds. In some cases the front wheel of the motorcycle can thrash from side to side causing the driver to lose control of the vehicle. Reports suggest stability problems with the FLH series of Harley-Davidson, also known as the Electra Glide, Road King, and Ultra Classic, which are widely used by law enforcement officers nationwide. Some observers have attributed the problem to an offset between the front and rear tires.