Plain English
Towing glossary
Five weights decide whether a tow is safe and legal. Here is each one: what it means, the maker's own definition, the mistake people make with it, and where to find your number.
The picture
How the weights fit together
- Loaded trailer weight — must stay under the towing rating
- The rating “It assumes a towing vehicle with any mandatory options, no cargo, tongue load of 10% (conventional trailer) or king pin weight of 15% (5th-wheel trailer), and driver and passenger (150 lbs. each).” Weight of additional options, passengers, cargo and hitch must be deducted from this weight. p. 7 ↗
- Tongue weight — the part of the trailer pressing on the hitch
- “For trailers up to 2,000 lbs., tongue load not to exceed 200 lbs. For conventional trailers over 2,000 lbs., tongue load is 10% of loaded trailer weight. For 5th-wheel trailers, king pin weight is 15% of loaded trailer weight.” p. 7 ↗
- Payload — people and cargo the truck can carry
- “Payload is the combined maximum allowable weight of cargo and passengers that the vehicle is designed to carry. It is the Gross Vehicle Weight Rating minus the Base Curb Weight.” And: “When towing, trailer tongue load or king pin weight is also part of the Cargo Weight.” p. 6 ↗
- GVWR and GCWR — the two ceilings
- “Gross Vehicle Weight Rating (GVWR) is the maximum allowable weight of the fully-loaded vehicle (including passengers and cargo).” “Gross Vehicle Weight PLUS Loaded Trailer Weight EQUALS Gross Combination Weight (GCW) GCW must not exceed GCWR.” Your GVWR is on the label on the driver's door jamb. p. 6 ↗
A to Z
Every term
Towing capacity (maximum loaded trailer weight)
The heaviest fully loaded trailer your exact configuration may pull.
“Maximum Loaded Trailer Weight (as shown in the Trailer Towing Selector charts for each vehicle) is the highest possible weight of a fully loaded trailer the vehicle can tow, based on a minimum towing vehicle GVW.” Ford 2026 guide, p. 7 ↗
Common mistake: Using the model's headline number. Your engine, axle ratio, cab and packages decide your number — often thousands of pounds lower.
Where to find yours: The maker's towing guide or owner's manual, for your configuration.
Loaded trailer weight
What the trailer really weighs on the road: the trailer plus everything in it.
“you should determine the approximate weight of the trailer you intend to tow, including the weight of any additional cargo and fluids that you will be carrying in the trailer.” Ford 2026 guide, p. 3 ↗
Common mistake: Comparing the trailer's dry weight with the tow rating. Water, propane, batteries and gear can add a lot.
Where to find yours: Weigh it at a truck scale, or use the trailer's GVWR (on its VIN sticker) as the worst case.
Tongue weight (king pin weight on a 5th-wheel)
The part of the trailer's weight that presses down on the hitch.
“For trailers up to 2,000 lbs., tongue load not to exceed 200 lbs. For conventional trailers over 2,000 lbs., tongue load is 10% of loaded trailer weight. For 5th-wheel trailers, king pin weight is 15% of loaded trailer weight.” Ford 2026 guide, p. 7 ↗
Common mistake: Forgetting it counts as cargo in the tow vehicle — it eats into payload.
Where to find yours: Measure it with a tongue-weight scale or at a truck scale; the hitch limit is on the hitch receiver label.
Payload
How much the vehicle itself can carry: people, cargo and the trailer's tongue weight.
“Payload is the combined maximum allowable weight of cargo and passengers that the vehicle is designed to carry. It is the Gross Vehicle Weight Rating minus the Base Curb Weight.” Ford 2026 guide, p. 6 ↗
Common mistake: Checking only towing capacity. A family, gear and a heavy tongue can overload the truck while the trailer is well under the tow rating.
Where to find yours: The tire and loading information label on the driver's door jamb of your vehicle.
GVWR — Gross Vehicle Weight Rating
The most the loaded tow vehicle may weigh, including passengers, cargo and tongue weight.
“Gross Vehicle Weight Rating (GVWR) is the maximum allowable weight of the fully-loaded vehicle (including passengers and cargo).” Ford 2026 guide, p. 6 ↗
Common mistake: Thinking it includes the trailer. It's the vehicle alone — the trailer is covered by GCWR.
Where to find yours: The Safety Compliance Certification Label on the driver's door or door pillar.
GCWR — Gross Combination Weight Rating
The most the loaded vehicle and loaded trailer may weigh together.
“Gross Combination Weight Rating (GCWR) is the maximum allowable weight of the towing vehicle and the loaded trailer – including all cargo and passengers – that the vehicle can handle without risking damage.” Ford 2026 guide, p. 6 ↗
Common mistake: Maxing out the trailer and the cargo at the same time — the two together can pass GCWR even when each is under its own limit.
Where to find yours: The maker's towing guide (next to each towing rating) or your owner's manual.
GAWR — Gross Axle Weight Rating
The most each axle (front or rear) may carry.
“Gross Axle Weight Rating (GAWR) is the maximum weight to be carried by a single axle (front or rear).” Ford 2026 guide, p. 6 ↗
Common mistake: Ignoring the rear axle: tongue weight lands mostly there.
Where to find yours: Also on the Safety Compliance Certification Label on the door.
Curb weight
The vehicle with a full tank and standard equipment, but no people or cargo.
“Base Curb Weight is the weight of the vehicle including a full tank of fuel and all standard equipment. It does not include passengers, cargo or any optional equipment.” Ford 2026 guide, p. 6 ↗
Common mistake: Using a brochure curb weight for a vehicle with heavy options — options count against payload.
Where to find yours: Ask the dealer for your build, or weigh the empty vehicle.
Weight-distributing hitch
A hitch with spring bars that spreads tongue weight across all the vehicle's and trailer's wheels.
“A weight-distributing hitch is used in conjunction with a hitch platform (receiver) to distribute tongue load to all towing vehicle and trailer wheels.” Ford 2026 guide, p. 5 ↗
Common mistake: Assuming the top rating applies with a plain ball hitch. Many top ratings require weight distribution.
Where to find yours: The maker's towing guide lists when it's required (for example, over a set trailer weight).
Trailer brakes
Brakes on the trailer itself, controlled from the tow vehicle.
“Many states require a separate braking system on trailers with a loaded weight of more than 1,500 pounds.” Ford 2026 guide, p. 3 ↗
Common mistake: Relying on the tow vehicle's brakes alone — they are rated for the vehicle's GVWR, not the whole combination.
Where to find yours: Your state's vehicle code sets the weight at which they're required.
Trailer frontal area
The size of the trailer's face pushing against the wind.
Common mistake: Choosing a trailer by weight alone. A tall, wide trailer can exceed the maker's frontal-area limit even when it's light.
Where to find yours: The maker's towing guide, on each vehicle's page (for example, 30 sq. ft. without a tow package).
Trailer classes
What each class of trailer weighs
Class I
up to 2,000 lbs
Small folding camping trailers and trailers for small boats, motorcycles and snowmobiles.
Conventional weight-carrying hitch.
Class II
2,001–3,500 lbs
Large folding camping trailers, single-axle, small- to medium-length (up to 18-ft.) trailers.
Weight-distributing hitch not required unless specified for a particular vehicle.
Class III
3,501–5,000 lbs
Dual-axle or large single-axle travel trailers.
Weight-distributing hitch not required unless specified for a particular vehicle.
Class IV
over 5,000 lbs
Largest travel and 5th-wheel trailers made for recreation.
Most applications require a conventional weight-distributing or 5th-wheel hitch.
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