failure. The oscillation frequency can be changed by changing the forward speed, making the bike stiffer or lighter, or increasing the stiffness of the steering, of which the rider is a main component. While wobble or shimmy can be easily remedied by adjusting speed, position, or grip on the handlebar, it can be fatal if left uncontrolled. Other things being equal, speed wobble is generally less likely to occur in a mountain bike compared to a road bike, because a mountain bike's frame generally has more damping from the suspension system, and the tire knobs also produce some dampening between the vehicle and road interface. Since shimmy frequency is independent of bike speed, gyroscopic effects "are clearly not essential to the phenomenon." The top five influences on wobble have been found to be lateral stiffness of the front tire, steering damper, height of bike center of mass, distance of bike center of mass from rear wheel, and cornering stiffness of the front tire. An academic paper that investigated wobble through physical experimentation and computer modeling concludes: "the influence on wobble mode of front tire characteristics, front frame inertia and chassis stiffness were shown. In particular, it shows that [by] increasing front tire inflation, chassis stiffness, and front frame inertia about steering axis and decreasing sideslip stiffness of front tire, wobble mode damping is improved, promoting vehicle stability." In single-wheeled mobility devices Speed wobbles occur on Electric unicycles (EUC) and single-wheeled skateboards (such as a Onewheel). "It almost looks threatening, but balancing on it is deceptively easy: The Onewheel uses a combination of accelerometers and gyro sensors to balance itself, which lets the rider focus on, well, riding." "To fix Onewheel wobbles, both feet need to be repositioned by inching them to a position that properly provides a center of gravity. The Onewheel’s controller is designed to only balance the board from front-to-back having no control of the side-to-side movement." See also Bicycle and motorcycle dynamics Caster flutter Fishtailing Hunting oscillation Pilot-induced oscillation Self-oscillation Tire balance Trailer (vehicle) Vehicle dynamics References External links Bicycle speed wobbles [Flash video of motorcycle+rider crashing due to a death wobble] Animation of shimmy Animation of death wobble Video of a high-speed streamlined bicycle crash showing death wobble Video of a truck with death wobble Automotive suspension technologies Cycling Dynamics (mechanics) Motorcycle dynamics