Explainer

Truck weight ratings use a small vocabulary that gets used loosely, including by people selling trucks. The definitions are worth knowing precisely because they are legal limits, not suggestions.

The four terms

GVWR — Gross Vehicle Weight Rating. The maximum the truck itself may weigh, fully loaded, including occupants, cargo and hitch weight. It is a rating of the vehicle, not a measurement of it.

GCWR — Gross Combination Weight Rating. The maximum for the truck and everything it is towing, together. This is the one that governs a loaded truck pulling a loaded trailer.

GAWR — Gross Axle Weight Rating. A per-axle limit, front and rear, each with its own figure. A truck can be under its GVWR and still over on one axle, usually the rear, because of where the weight sits.

Curb weight — what the truck weighs empty with fluids. Payload is broadly GVWR minus curb weight.

Why GAWR catches people

Axle ratings are the most commonly exceeded and least commonly checked.

Weight behind the rear axle — a slide-in camper, a heavy tailgate load, a hitch-mounted carrier — loads the rear axle disproportionately and can even lift weight off the front, which reduces steering authority.

A scale ticket that reports per-axle weights tells you this. A total weight does not.

The sticker

The certification label in the driver’s door jamb carries the GVWR and both GAWR figures for that specific vehicle as built, along with the original tyre and rim specification and inflation pressures.

If the truck has been re-tyred with something different, that last part matters — the inflation figures on the sticker apply to the tyres listed on it.

Ratings are not measurements

The most useful mental shift: these are limits set by the manufacturer based on brakes, frame, suspension, axles and cooling. They are not estimates of what the truck can physically move.

A truck will happily pull more than its GCWR on flat ground in good weather. The rating exists for the moment that is not true — a descent, a crosswind, an emergency stop — and that is precisely when exceeding it becomes evident.

This article was researched and drafted with the assistance of AI tools and reviewed, fact-checked and edited by Leonidas Clark before publication. Figures vary by vehicle and configuration; confirm against your own door sticker and owner’s manual.