Understanding Gross Vehicle Weight Rating
Off-roading often requires vehicle modifications that can add weight to your rig, as well as a lot of gear to ensure you stay safe and comfortable when you're out on the trail - this makes managing your vehicle's gross weight and keeping tabs on payload a bit of a puzzle at times. But figuring this out is its own kind of thrill; it requires intimate knowledge of the vehicle’s capabilities and some creative and imaginative problem-solving.
Before taking your truck or SUV out on the trail, you’ll want to get familiar with it's weight, payload capacity, and towing limits. An overloaded overland vehicle will not only perform poorly but can be much more prone to sustaining serious damage or mechanical issues on the trail - either of which will quickly derail an off-road adventure. In this guide we'll help you plan for success and safety by learning the basics of vehicle weights and payloads.
Determine Your GVWR and Payload Limits
Every vehicle comes with weight and towing capacities from the manufacturer. You can find them in your owner’s manual or online at the manufacturer’s website. Some vehicles may also put these figures on a tag inside the doorframe. For this article, we will use a 2023 3rd Gen Toyota Tacoma as our example rig. We’re using the SR model, 4x4 double cab with a v6 engine, 6-speed automatic transmission, and a 5-foot bed equipped with a Class IV trailer hitch. The Toyota website lists the following weights and capacities:
|
GVWR (gross vehicle weight rating) This is the maximum weight of the vehicle plus all fluids, passengers, and cargo that the Tacoma can safely carry. |
5600lbs |
|
Curb Weight This is the weight of the truck plus all fluids filled up completely. |
4445lbs |
|
Payload This is the maximum payload the vehicle can carry. Payload is everything in the truck over and above the curb weight. |
1155lbs |
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GCWR (gross combined weight rating) This is the maximum weight this truck plus a trailer can carry. |
11,360lbs |
|
Towing This is the maximum weight the Tacoma can tow. |
6400lbs |
|
Tongue This is the maximum weight the ball of the Class IV hitch on the truck can withstand. |
640lbs |
How to Manage Your GVWR & Payload for Off Roading
Now what?
With this info in-hand, let's take a closer look at some of these numbers and their relationships to help us understand what they mean for modifying and loading up the truck for off-roading.
Without a Trailer
If you aren't planning on pulling a trailer, how much extra weight can you add to the 2023 Tacoma? You know the truck's curb weight, or unloaded weight, is 4445lbs, and you know the GVWR is 5600lbs. That's the maximum weight the truck was built to handle. The payload limit – the amount of extra stuff you can carry – is the difference between these two.
- GVWR - Curb weight = Payload
In this example, the math looks like this:
- 5600lbs - 4445lbs = 1155lbs
You can safely add 1155 pounds to this 3rd Gen Tacoma model.
That sounds like a lot, but it's less than you think. Think through this example:
- You and your buddy will be riding in the vehicle. Let's say you both clock in at about 180lbs for a total of 360lbs for people. Now the 1155lbs has gone to 795lbs. (1155lbs-360lbs)
- You want to add a recovery winch, which means you need to upgrade the front bumper. You can choose a solid steel bumper with a winch cradle. Steel is strong, but heavy. Depending on the design, you can expect a steel bumper to weigh about 175lbs, give or take. Or you can install a Hi-Lite Series Overland Front Bumper from Backwoods Adventure Mods that is built using a hybrid of aluminum and steel. This sweet-looking, lightweight, super strong bumper protects your vehicle and only weighs around 80lbs (plus you'll lose around 40lbs removing your stock bumper, so the actual impact on your payload is only around 40lbs)!
- You're also likely considering a few other mods, such as auxiliary lighting, skid plates, and possibly even a rear bumper. Maybe you also want a roof rack or a bed rack to keep your gear stowed safely away and easily accessible. All these modifications add weight to your vehicle, and that weight adds up fast. You could totally max out the GVWR of your Tacoma before packing any food, dry clothing, or a sleeping bag.
Sure, your truck will handle the max just fine on straight paved roads, but what about when rock-crawling up a steep incline? In addition, it's never really a good idea to max out the GVWR. Experts recommend staying within 80% of the maximum safe weights.
With a Trailer
Adding a trailer, boat, or camper makes things a bit more complicated. There are three numbers on the chart above that relate to towing. The GCWR (11,360lbs) is the maximum load the Tacoma can carry. That is everything – the truck itself plus everything in it plus a trailer and everything in the trailer. The combo of all that can't exceed 11,360lbs.
You also know the towing capacity of the Tacoma is 6400lbs, and the tongue weight is 640lbs. With the Class IV hitch, this truck can safely tow 6400lbs. The tongue weight tells you the downward force the actual hitch can withstand, which is generally about 10% of the towing capacity. How do you use the towing capacity numbers? Here's one way to think about it:
You know the GCWR is 11,360lbs. That's everything. You know what you can tow – 6400lbs – and you know your curb weight – 4445lbs. If you tow the max, the math looks like this:
- GCWR - Towing - Curb weight = remaining payload capacity or
- 11360lbs - 6400lbs - 4445lbs = 515lbs
- 515lbs - 360lbs (two people) = 155lbs
That 155 is the most you can add to the truck without exceeding the GCWR. That's not much and is probably really nothing if you've added any mods to your vehicle.
Another way to think about towing capacity is simply subtracting the GVWR from the GCFR. In this case, the result is 5760lbs (11,360lbs - 5600lbs). While the Tacoma is strong enough to tow 6400lbs, 5760lbs is a more realistic limit to what you should safely tow. It's good to look at towing capacity both ways and observe the lower number.
Conclusion
Don't make a rookie mistake and overload your vehicle - embrace the challenge of staying within your truck's weight limits. Off-road accessories and modifications from Backwoods Adventure Mods are designed with off-roading and overlanding in mind. Our products are strong, durable, and lightweight. Consult our guide to overland vehicle mods or talk to one of our specialists to find the best mods for your rig - then get out there and enjoy the ride!