What TowAtlas checks
A towing setup has more than one limit, not just a maximum tow rating. Rig Check compares your loaded truck and trailer against payload, truck GVWR, GCWR (combined weight), front and rear axle ratings (GAWR), the conventional or fifth-wheel/gooseneck tow rating, the receiver tongue rating or installed pin-hitch rating, and trailer GVWR, using whichever of those ratings it has. Tongue or pin weight, passengers, truck cargo and hitch equipment all count against payload. The verdict comes from the limit you're closest to. Rig Check shows that limit as "Closest checked limit" with the percentage used. A limit at 80% or more is flagged as close, and anything over a limit is flagged even if every other check passes. If a key rating is missing, TowAtlas asks for it and doesn't guess. TowAtlas is planning support, not a safety certification. It doesn't certify a combination as safe or legal, and it doesn't replace manufacturer instructions, vehicle labels, professional inspection, scale measurements or local laws.
Related guides: Towing capacity vs payload · GVWR vs GCWR · Can my truck tow this trailer?
Where the ratings come from
The TowAtlas vehicle database is built from manufacturer-published towing data, organized by make, model year and configuration: engine, drivetrain, cab, axle ratio and any required towing package. Some records are matched to an exact configuration. Others are a configuration or model-line reference, which is why a reference never stands in for your truck's own labels. Each record cites the manufacturer document it came from, such as an OEM towing guide or spec sheet. Results show it as "Source:" with the document name, linked to the document when a link is available. Your VIN identifies the vehicle using NHTSA manufacturer-reported data, and TowAtlas then prefills any matching factory reference data. A VIN doesn't fix payload, axle, hitch or towing ratings, because those vary with equipment. The driver-door label (door-jamb sticker) carries the ratings for your specific truck, and you can scan it or type the numbers in My Garage. Whenever your label or scale weights differ from a reference, your label and scale weights win.
What the confidence levels mean
Every Rig Check result has a "How strong is this result?" box with one of four levels, from weakest to strongest:
- Planning-level check. The result uses estimates or manually entered ratings. It's useful for shopping and planning, not for a final towing decision.
- Configuration reference. TowAtlas matched your truck to an OEM configuration reference. Confirm the door, payload and hitch labels before you rely on it as exact.
- Label-confirmed truck. You entered your truck's ratings from its door label, by scan or by typing them in. Add loaded scale weights for the strongest check.
- Scale-verified inputs. Actual loaded truck and axle weights are included. Keep the truck and trailer ratings checked against their labels too.
Each database record also has a confidence score. High-confidence records score 90% or higher. Exact-configuration records are matched to one specific configuration, not to a maximum for an engine, cab or model line.
When TowAtlas calls a rating verified, it means one thing: the rating comes from a manufacturer-sourced record for that exact configuration. Anything you add yourself, including a door-label scan, typed-in ratings and scale weights, is shown as user-entered. It's your own data, and TowAtlas never marks it as verified.
Coverage
The database currently has active towing references for makes, covering model years . Of those, are high-confidence and are exact-configuration.
If your truck isn't listed, it's older, or it's a year, make or model we don't have yet, choose "I can't find my vehicle" in My Garage. You can still save the truck and enter its ratings from the door label yourself, and Rig Check works with manually entered ratings. Those results show as a Planning-level check until you confirm them from the label or add scale weights.
Standards
Many manufacturers set tow ratings using SAE J2807, a voluntary SAE standard titled "Performance Requirements for Determining Tow-Vehicle Gross Combination Weight Rating and Trailer Weight Rating." It tests the loaded truck and trailer on acceleration, launching on a 12% grade, a long hot-weather highway climb modeled on Arizona's Davis Dam grade, handling and trailer sway, braking and parking-brake hold, and the structure of the vehicle and hitch. It also sets standard assumptions, such as a driver and passenger and 10% tongue weight for conventional trailers. Manufacturers began adopting it in the early-to-mid 2010s, and adoption still varies by brand and truck class. Check your manufacturer's towing guide to see whether a rating is J2807-based. Even under the same standard, ratings change with cab, bed length, engine, drivetrain, axle ratio, options and installed equipment. That's why TowAtlas uses your exact configuration whenever it can and doesn't use the highest number advertised for the model line.
How to get a more accurate answer
- Check your door-jamb sticker. The driver-door label carries ratings for your specific truck, such as payload and axle ratings. Scan it or enter it in My Garage.
- Use your VIN. Scan or enter the 17-character VIN so TowAtlas can identify the vehicle and prefill matching reference data. Then review every number before you save.
- Weigh at a CAT Scale. Weigh loaded the way you actually travel, with passengers, fuel, propane, water and cargo. Then enter the ticket in the CAT Scale Calculator and add the axle weights to Rig Check. See How to read a CAT Scale ticket for towing.
Re-run Rig Check whenever passengers, cargo, water, hitch equipment or trailer loading changes. Also see Towing capacity vs payload, GVWR vs GCWR and the Pre-Tow Safety Checklist.
Who builds TowAtlas
TowAtlas's founder has more than 10 years of experience in the towing and recovery industry, from light-duty to heavy-duty work. In that time, the founder has also transported heavy equipment of every size, across all weight classes. The site is designed to help RV owners, trailer users and commercial drivers understand the numbers that matter before they tow or haul. Towing information is scattered across door-jamb labels, owner manuals, dealer brochures, scale tickets and manufacturer charts. TowAtlas brings that math into one place, so you can compare payload, trailer weight, axle load, hitch weight and combined weight without building your own spreadsheet every time. Read more about TowAtlas.
Data last updated and report an error
Spot a rating that doesn't match your truck's label or manufacturer guide? Email [email protected] or visit the Contact page. Include the year, make, model and configuration, the rating TowAtlas showed, the value you expected and where it comes from, such as a door label photo or a page in the manufacturer's towing guide. TowAtlas can help with the math but can't confirm by email that a specific combination is safe or legal.