The GVWR is the total allowable weight of a fully equipped vehicle and includes the weight of the driver, passengers, cargo, all fluids, accessories and the tongue weight of the trailer. Read More »

The GCWR is the maximum allowed weight and includes a fully loaded tow vehicle with driver, passengers plus a fully loaded trailer. Read More »

The GTWR is the maximum trailer weight including trailer plus the cargo inside. Read More »

The GAWR is the maximum weight each axle is designed to carry safely. It includes the entire weight of the vehicle, occupants, cargo, trailer tongue weight and so forth, but now distributed between front and rear axles. Read More »

The green flag with a yellow diagonal stripe signals a slower driver to move over on the track and let the leaders proceed. This usually occurs near the end of a race when the slower car is many laps behind. This flag is to ensure safety for the cars still racing for the win. Read More »

Another name for a viable racing lane on the race track. Read More »

Gross Vehicle Weight Rating refers to the maximum loaded weight of a vehicle, including fuel, fluids, and full payload. Read More »

Electric elements that heat up the cylinders of a diesel engine to assist cold starting. Turning the ignition to “on” switches on the glow plugs, which usually need between two and ten seconds to operate, depending the temperature of the engine and the outside air. Read More »

The relationship of engine revolutions to drive-wheel revolutions, expressed as a ratio. The transmission allows gear ratios to be changed, while gearing at the differential (called the “final drive ratio”) is constant. Gearing is expressed as a ratio, such as 3:1 (three input revolutions for every one output revolution). The higher the first number, the lower the gearing. Low gearing ... Read More »

Gravitational loads, expressed in multiples of the force of gravity acting on an object. In a car, these can be felt in acceleration, braking or cornering. In most passenger cars, these loads seldom exceed 0.3 or 0.4 Gs in any direction, unless in an urgent situation. Race cars can achieve several Gs, due to excellent tires and prepared racing surfaces. Read More »