1962 Rambler Classic Custom 4-door sedan blue 2015 AMO meet 3of4

A brodie knob (alternative spelling: brody knob) is a

doorknob A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard doors and vehicle doors. There are many ...

-shaped

handle A handle is a part of, or attachment to, an object that allows it to be grasped and manipulated by hand. The design of each type of handle involves substantial ergonomic issues, even where these are dealt with intuitively or by following tra ...

that attaches to the

steering wheel A steering wheel (also called a driving wheel (UK), a hand wheel, or simply wheel) is a type of steering control in vehicles. Steering wheels are used in most modern land vehicles, including all mass-production automobiles, buses, light and ...

of an

automobile A car or automobile is a motor vehicle with Wheel, wheels. Most definitions of ''cars'' say that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, pe ...

or other vehicle or equipment with a steering wheel. Other names for this knob include suicide, necker, granny, knuckle buster, and wheel spinner.

Design and use

The device is a small, independently rotating knob (similar to a U.S. classic

door knob A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard doors and vehicle doors. There are many ...

) facing the driver that is securely mounted on the outside rim of a steering wheel. The protruding knob is an aftermarket accessory. The free rotation is intended to help make steering with one hand easier or faster. Brodie knobs were popular on

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction ...

s and tractors before the advent of

power steering A power steering is a mechanical device equipped on a motor vehicle that helps drivers steer the vehicle by reducing steering effort needed to turn the steering wheel, making it easier for the vehicle to turn or maneuver at lower speeds. Hydraul ...

. Their main use today is still in trucks, particularly

semi truck A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer a ...

s, where they allow simultaneous

steering Steering is a system of components, linkages, and other parts that allows a driver to control the direction of the vehicle. Introduction The most conventional steering arrangement allows a driver to turn the front wheels of a vehicle using ...

and operation of the

radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmit ...

gearshift A gear stick (rarely spelled ''gearstick''), gear lever (both UK English), gearshift or shifter (both U.S. English), more formally known as a transmission lever, is a metal lever attached to the transmission of an automobile. The term ''gear stic ...

. They are also used on

forklift A forklift (also called lift truck, jitney, hi-lo, fork truck, fork hoist, and forklift truck) is a powered industrial truck used to lift and move materials over short distances. The forklift was developed in the early 20th century by various c ...

s, farm

tractors A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most common ...

, construction equipment, riding

lawnmowers A lawn mower (also known as a mower, grass cutter or lawnmower) is a device utilizing one or more revolving blades (or a reel) to cut a grass surface to an even height. The height of the cut grass may be fixed by the design of the mower, but g ...

, and

ice resurfacer An ice resurfacer is a vehicle or hand-pushed device used to clean and smooth the surface of a sheet of ice, usually in an ice rink. The first ice resurfacer was developed by American inventor and engineer Frank Zamboni in 1949 in the city of Pa ...

s, where frequent sharp turning is required. The knobs are often installed as an aftermarket accessory on farm and commercial tractors, its main purpose being to ease one-handed steering while the driver operates other controls with the other hand or is traveling in reverse. Some

boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ...

s are equipped with a helm featuring a stainless-steel wheel with a brodie knob.

Etymology and disadvantages

The "Steering Wheel Spinner Knob" was invented by Joel R. Thorp of Wisconsin in 1936. The Brodie name is a reference to Steve Brodie and was meant to describe all manner of reckless stunts. The device is often called a "suicide knob" because of being notoriously useless for controlling the wheel during an emergency. It is also called a "knuckle buster" because of the disadvantage posed by the knob when letting go of the steering wheel after going around a corner, the wheel spins rapidly and the knob can hit the user's knuckle, forearm, or elbow. If the driver is wearing a long-sleeved

shirt A shirt is a cloth garment for the upper body (from the neck to the waist). Originally an undergarment worn exclusively by men, it has become, in American English, a catch-all term for a broad variety of upper-body garments and undergarments. I ...

, the protruding accessory on the rim of the steering wheel can also become caught in the

sleeve A sleeve ( ang, slīef, a word allied to ''slip'', cf. Dutch ) is the part of a garment that covers the arm, or through which the arm passes or slips. The sleeve is a characteristic of fashion seen in almost every country and time period, acro ...

's open cut by the button. Other names include "granny knob" "necker's knob" and "wheel spinner."

Legality

Brodie knobs are legal on private vehicles in most U.S. states. U.S.

Occupational Safety and Health Administration The Occupational Safety and Health Administration'' (OSHA ) is a large regulatory agency of the United States Department of Labor that originally had federal visitorial powers to inspect and examine workplaces. Congress established the agenc ...

regulations restrict use of auxiliary devices for specific construction vehicles. OSHA prohibits modification of industrial equipment without the approval of the equipment manufacturer.

References

{{reflist Automotive accessories Control devices Vehicle parts Tractors