speed wobble

One usually bends his/her knees in order not to "speed wobble".

A tire's relaxation length controls how much the tire will contribute to speed wobble.

This prevents low speed wobble which may occur in the lower speed range of about 13 to 20 mph.

It was notoriously dangerous, being prone to up-and-over wheelies and speed wobbles.

At moderate speeds it suffered speed wobbles.

A Raleigh, North Carolina police officer, Charles Paul, was killed when his 2002 police touring motorcycle wrecked after reportedly experiencing a high speed wobble.

The 'shocks' present in channel trucks are there to dampen the turning system, and help reduce the oscillations of the trucks on the board commonly described as speed wobble.

Disc phonographs using a direct system of gears turned more evenly; the heavy metal turntable of disc machines acted as a flywheel, helping to minimize speed wobble.

Wobble, shimmy, tank-slapper, speed wobble, and even death wobble are all words and phrases used to describe a quick (4-10 Hz) oscillation of primarily just the steerable wheel(s) of a vehicle.

Combined with the changes to the frame, this helped to eliminate the tendency of the handlebars to shake violently during rapid acceleration or deceleration on less-than-perfect surfaces, a phenomenon known as a speed wobble or tank slapper.

It was notoriously dangerous, being prone to wheelies and speed wobbles, the dangerous handling characteristics arising from its mediocre frame design and caused it to be nicknamed the "Widowmaker" by motorcycle enthusiasts of the 1970s.

The reason for this is to avoid potential speed wobble under full acceleration due to the motorcross style handlebars atop high machined ergal risers causing the rider to sit more upright, resulting in less weight over the front wheel.