Which mobile antennas are flexible?

Mobile amateur radio antennas that offer flexibility are typically designed to be mechanically compliant, for example to withstand wind loads or contact with tree branches, and to allow easy adaptation to different frequency bands. Flexible options include antennas with springs at the base that flex when touched, as well as antennas with removable or replaceable radiating elements to change the frequency range. Some models also offer the ability to change the radiation pattern using adjustable elements, allowing users to choose between omnidirectional and directional signals. Magnetic base antennas are also a flexible solution as they can be easily attached to and removed from the vehicle. Although this option always depends on the specific model of antenna and magnetic base, there are speeds that can be dangerous in this configuration.