Fiat 500X 2017 Owner's Manual page 276

274 STARTING AND OPERATING
Gross Combination Weight Rating (GCWR)
The GCWR is the total allowable weight of your vehicle
and trailer when weighed in combination.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum capacity of the front and
rear axles. Distribute the load over the front and rear
axles evenly. Make sure that you do not exceed either
front or rear GAWR. Refer to "Vehicle Loading/Vehicle
Certification Label" in "Starting And Operating" for
further information.
WARNING!
It is important that you do not exceed the maximum
front or rear GAWR. A dangerous driving condition
can result if either rating is exceeded.
Tongue Weight (TW)
The tongue weight is the downward force exerted on
the hitch ball by the trailer. You must consider this as
part of the load on your vehicle.
Frontal Area
The frontal area is the maximum height multiplied by
the maximum width of the front of a trailer.
Trailer Sway Control — Mechanical
The trailer sway control is a telescoping link that can be
installed between the hitch receiver and the trailer
tongue that typically provides adjustable friction asso-
ciated with the telescoping motion to dampen any
unwanted trailer swaying motions while traveling.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue
weight, just as if it were luggage located at a hitch ball
or some other connecting point of the vehicle. These
kinds of hitches are the most popular on the market
today and they are commonly used to tow small and
medium sized trailers.