Towing Capacity Explained: What the Ratings Mean and How They Are Set

What the published number actually is

Ford's 2026 RV & Trailer Towing Guide defines Maximum Loaded Trailer Weight, the figure printed in its Trailer Towing Selector charts, as the highest possible weight of a fully loaded trailer the vehicle can tow, based on a minimum towing vehicle GVW. The assumptions behind it are printed alongside: any mandatory options, no cargo, a 10% tongue load on a conventional trailer or 15% king pin weight on a fifth wheel, and a driver and passenger of 150 lb each.

Then comes the sentence most buyers never read. Ford states that the weight of additional options, passengers, cargo and hitch must be deducted from that weight. The headline number is a ceiling for an empty truck, not an allowance for a loaded one.

Chevrolet frames the same point as a set of competing limits. Its 2026 Trailering Guide says the maximum trailer weight rating represents the heaviest trailer the vehicle can tow, but that it may be necessary to reduce the trailer weight to stay within the GCWR, GVWR, maximum trailer tongue load or rear axle rating.

Toyota puts it in one line: the maximum you can tow depends on base curb weight plus the total weight of any cargo, occupants and added vehicle equipment.

The ratings that have to hold at the same time

Ford separates measured weights from ratings, and the distinction is the whole game: GVW, GAW and GCW are numbers a scale gives you, while GVWR, GAWR and GCWR are limits the manufacturer sets.

Definitions from the 2026 Ford RV & Trailer Towing Guide (Weight Limits, pages 6 and 7) and the 2026 Chevrolet Trailering Guide (Trailering basics, pages 7 and 8).

Ford reduces the relationship to two formulas: base curb weight plus cargo weight plus passenger weight equals GVW, which must not exceed GVWR; and GVW plus loaded trailer weight equals GCW, which must not exceed GCWR. Ram works the same arithmetic backwards for shoppers, telling them to subtract the vehicle's curb weight and payload weight from GCWR to find how much it can tow.

How the number is set

Ford describes SAE J2807 as the Society of Automotive Engineers testing standard that defines procedures and requirements to determine gross combined weight ratings and to calculate the trailer weight rating for any tow vehicle, establishing minimum performance conditions to allow consistent comparisons between similar class vehicles. Ford says it applies the standard to all vehicles, and each F-150 towing table carries the note "Calculated with SAE J2807 method". Ram heads its trailer table "Maximum Trailer Weight Capacities, SAE J2807 Compliant".

Chevrolet describes the work rather than the standard: engineers perform extensive testing of acceleration, handling, braking, and thermal and structural performance to determine the GCWR and the maximum trailer weight rating for the vehicle. That is who decides the number, and it is why it is a system rating rather than an engine specification.

Why two trucks of the same model carry different ratings

Same badge, same bed, different number. Ram lists the variables that move it: engine and transmission, axle ratio, two-wheel versus four-wheel drive, cab size and box length. A 4x2 carries higher towing and payload capacities because 4x4 hardware adds truck weight, and a smaller cab or shorter box lowers curb weight, which leaves more room under GCWR.

Axle ratio pulls in two directions, and Chevrolet says so: a higher axle ratio offers higher trailer weight ratings, quicker acceleration and less fuel efficiency, while a lower ratio offers more fuel efficiency and quieter operation but slower acceleration and lower trailer weight ratings. Chevrolet also notes that many factors feed a tow rating, including available driveline torque, powertrain cooling capacity, suspension and chassis load-carrying capacity, and items affecting stability such as tire grip, wheelbase and steering response.

One published chart shows the spread inside a single cab and bed combination:

Figures for the 2026 Ram 1500 Tradesman Crew Cab with the 5' 7" bed, from Ram's 2026 Ram 1500 Payload & Towing Weight Capacities chart; the chart covers the Tradesman trim only. The gap between the first and last 4x4 rows is 4,860 lb, calculated from those two rows.

Trim and equipment do the rest. Ford warns that a specific vehicle's tow capability could be reduced by the weight of the selected trim series and option content, and that the top figures are gated behind hardware: on the 2026 F-150 gas pickup, trailers over 11,600 lb require the Tow/Haul Package (53T) and the optional Max Tow Axle, with the hybrid threshold at 10,800 lb, and Ford states the New Vehicle Limited Warranty may be voided if you tow without them.

Chevrolet adds that a higher series number in a model generally indicates greater load-carrying capacity, usually with a stronger frame, stiffer suspension and higher-capacity brakes. This is why a general figure for a half-ton pickup is only ever a range until you identify the build.

Trailer classes and hitch types

Trailer classes sort trailers by gross trailer weight and point to the minimum hitch. Ford defines four classes and notes that some industry sources call trailers over 10,000 lb Class V; Chevrolet defines five outright.

Classes from the 2026 Ford RV & Trailer Towing Guide (page 4) and the 2026 Chevrolet Trailering Guide (page 7).

Ford's hitch styles follow the same logic. A weight-carrying hitch is commonly used for small and medium trailers. A weight-distributing hitch works with the receiver to distribute tongue load to all tow vehicle and trailer wheels, and Ford calls it required for certain Class III and all Class IV applications.

A fifth-wheel hitch mounts in the pickup bed to put more trailer weight directly over the tow vehicle, and a gooseneck puts the tongue weight on the bed directly over the rear axles. The strength of the wording differs between makers: Ford prints "do not exceed trailer weight of 5,000 lbs. when towing without a weight-distribution system" under its F-150 tables, while Ram's chart says a weight distributing system is recommended for trailers over 5,000 lb.

The "80 percent rule"

The rule people quote says to load a trailer to no more than 80 percent of the truck's rating and treat the rest as margin. It is common advice, not a published standard.

A full-text search of the 2026 Ford and Chevrolet guides, Ram's 2026 Ram 1500 chart and Before You Buy page, Toyota's towing page and three current owner's manuals turns up no 80 percent rule and no recommendation to tow a set percentage below the rating. Every percentage in those documents is something else: tongue load, king pin weight, a cargo distribution rule of thumb, an elevation correction.

What the guides tell you to do instead is concrete:

• Ford: have the fully loaded vehicle, including passengers, and the trailer weighed so as not to exceed critical weight limits, and if any limit is exceeded, remove cargo from the vehicle or trailer until all weights are within the limits.
• Chevrolet: the only way to be sure you are not exceeding GCWR, GVWR, RGAWR or the trailer weight rating is to weigh the tow vehicle and trailer combination fully loaded for the trip, getting individual weights for each.
• Ford: GVW must never exceed GVWR, the load on each axle must never exceed its GAWR, and measured GCW must never exceed GCWR; if tongue load pushes GVWR or rear GAWR over, go with a larger vehicle or a smaller trailer.
• Ram: GAWRs, GVWRs and GCWRs should never be exceeded.

Ford does publish one piece of headroom advice, and it is qualitative rather than a percentage: its charts show the minimum powertrain needed for acceptable towing performance at the listed GCW, and when a trailer has a large frontal area or the route is hilly or mountainous, it says it is wise to choose a vehicle with a higher rating.

That is the practical reason a tall travel trailer behind one of the SUVs rated to tow one can feel at its limit well below the printed figure. Ford's only published percentage reduction is for altitude: to match driving performance as perceived at sea level, reduce GVW and GCW by 2% per 1,000 ft of elevation.

Trailer brakes

Ford states that many states require a separate braking system on trailers with a loaded weight of more than 1,500 lb, and recommends a separate functional brake system on any towed vehicle, including those dolly-towed or towbar-towed.

Chevrolet sets its own thresholds by model: trailer brakes are required above 2,000 lb of trailer weight on Silverado, Suburban and Tahoe, and above 1,500 lb on all other models. Both guides say brake requirements vary by state and tell you to check state law, which is the figure that governs you on the road.

Ford names three basic trailer brake types: electronically controlled brakes, which need a controlling device and additional wiring in the tow vehicle, electric-over-hydraulic brakes, and surge brakes activated by a master cylinder at the hitch. Which one the trailer uses decides what brake controller the truck needs, and whether it needs one at all. The NHTSA towing pages cover the driving side of the same ground.

Payload: the rating that usually runs out first

Ford defines payload as the combined maximum allowable weight of cargo and passengers the vehicle is designed to carry, equal to GVWR minus base curb weight. The sentence that catches people is the next one: when towing, trailer tongue load or king pin weight is also part of cargo weight.

Ford's note under its F-150 tables says to make sure vehicle payload, reduced by option weight, will accommodate the tongue load plus the passengers and cargo you add, and that together they cannot push the vehicle past rear GAWR or GVWR.

Tongue weight and king pin weight

Ford gives single figures: for trailers up to 2,000 lb, tongue load not to exceed 200 lb; for conventional trailers over 2,000 lb, tongue load is 10% of loaded trailer weight; for fifth wheels, king pin weight is 15%.

Chevrolet gives ranges instead, 10% to 15% for conventional and 15% to 25% for gooseneck and fifth wheel, and says that when towing the maximum trailer weight the maximum is 10% conventional and 15% gooseneck or fifth wheel. Those percentages are what connect the trailer's weight to the truck's payload, which is why tongue weight is worth measuring rather than assuming.

Where your own ratings are written

None of the above is your truck's number. Ford puts GVWR, GAWR and tire data on the Safety Compliance Certification Label on the left front door lock facing or the door latch post pillar, and tells owners to see the doorjamb label for the carrying capacity of a specific vehicle.

Chevrolet adds a Trailering Information Label on the driver-side door jamb of the Silverado 1500, Silverado EV, Silverado HD, Suburban and Tahoe, listing GVWR, GCWR, rear GAWR, maximum payload, maximum tongue weight and curb weight for that one vehicle. Everything else comes from the owner's manual and the towing guide for your model year, and finding your own ratings takes a few minutes.

Common questions