Before revision: Wobble, shimmy, tank-slapper, speed wobble, and even death wobbleare all words and phrases used to describe a quick (4–10 Hz) oscillation of primarily just the steerable wheel(s) of a vehicle.
After revision: Speed wobble (also known as shimmy, tank-slapper, speed wobble, or death wobble) is a quick (4–10 Hz) oscillation of primarily the steerable wheel(s) of a vehicle.