Additionally, R.C. 4513.11 states, "No person shall drive any vehicle with a gross vehicle weight of 10,000 pounds or less with any equipment or load that obstructs the driver's view to the rear or sides of the vehicle or interferes with the driver's ability to steer, brake, or signal as required by law."
As steering knobs can potentially obstruct a driver's view and interfere with their ability to steer, they may be considered illegal under these laws. It is best to consult with local traffic authorities or legal experts to confirm whether steering knobs are permitted in Ohio.