HomeBlogBlogAre Steering Wheel Knobs Illegal? Spinner vs Phone Mounts

Are Steering Wheel Knobs Illegal? Spinner vs Phone Mounts

Are knobs on the steering wheel illegal?

It depends on where you drive and what kind of “knob” you mean. A traditional steering wheel spinner knob (often called a suicide knob) is legal in many states, but some states restrict it, require it to be installed a certain way, or only allow it for drivers with a medical waiver or adaptive-equipment permit. A newer category—clip-on “steering wheel phone holders” or mounts that create a knob-like grip—can also run into different rules, especially if they obstruct the wheel, interfere with airbag deployment, or violate hands-free or obstruction laws.

What affects legality?

1) State-by-state vehicle equipment rules

Traffic and equipment laws vary widely. Some states treat spinner knobs as assistive devices and regulate them under adaptive driving equipment requirements. Others don’t mention them specifically, but enforcement may still happen if an officer considers the device unsafe or improperly installed.

2) Safety and “obstruction” concerns

Even where not explicitly banned, a knob can be cited if it creates a hazard: catching on clothing, reducing steering control, loosening during turns, or blocking a view of the dashboard. Devices attached to the wheel may also be questioned if they could affect airbag function or the driver’s ability to keep both hands on the wheel.

3) Phone-mount knobs are a special case

If the “knob” is actually a phone holder attached to the steering wheel, it may draw extra scrutiny. Beyond general equipment safety, it can encourage interaction with the screen while turning—something that can be risky and potentially relevant under distracted-driving laws.

Practical guidance before using one

Check your state’s DMV or highway patrol guidance and confirm whether a permit or medical authorization is required. If you’re considering a steering wheel-mounted phone setup, it’s smart to compare safer, more stable options designed for glanceable navigation. See the detailed guide here: https://ulorin.com/guide-steering-wheel-phone-mount-safer-glanceable-navigation/.

FAQ

Where should I mount my phone for navigation so it’s safer and less distracting?

Aim for a position that keeps the screen close to your normal line of sight without blocking the windshield or instruments—often a vent, dash, or windshield mount placed thoughtfully. The safest setup also minimizes the need to touch the phone by using voice control and pre-set routes.