How Much Can You Tow?
How much can you tow? Do you regularly hitch up a utility trailer full of tools? Are you hauling horses and other livestock? Or do you just need to pull your boat to the lake a few weekends of the year? Whatever you’re using your trailer hitch for, you need to make sure your towing needs and towing capacity match; your safety and the safety of others on the road around you depend on it.
Many factors contribute to a vehicle’s towing capacity: axle ratio, transmission configuration (whether it is rear or front wheel drive), tire and suspension load ratings, engine cooling equipment, type of brakes, etc. As you might expect, full size trucks, have, by class the highest towing capacity. Topping the list of heavy haulers is the 2008 Ford F450 with a whopping 24,000 lbs of towing capacity. That’s huge! In fact, it’s a full size back hoe (without a trailer). Also impressive is the the Nissan Armada (in the full size SUV class) with a 9,000 lb capacity. But the real shocker is the Hyundai Elantra, member of the compact sedan class, which checks in at 3,086 lbs towing capacity if the trailer is equipped with brakes, and 1,000 lbs for a trailer with no brakes. That’s the same or more towing power in a budget-priced compact that you will find in many more expensive full size sedans!
So, how much can you tow? Well, your vehicle’s towing capacity is listed with other manufacturer’s specs in your owner’s manual. There you will find at least two numbers relating to towing capacity; these are the gross trailer weight capacity (the weight of the trailer fully loaded) and ball weight capacity, (the amount of weight the trailer puts on your hitch ball). These numbers are pretty important as far as your safety and the safety of the drivers around you. A vehicle towing a trailer that is too heavy or improperly loaded will not have the steering or braking control necessary to operate safely. Please take the steps necessary to ensure you are towing safely.
You can (and should) measure your gross trailer weight on a commercial scale (check the yellow pages to find one locally). Make sure you have your trailer loaded as you normally would before weighing it. Drive the trailer completely on the scale, unhitch it and make sure the jockey wheel and all trailer wheels are on the scale. This gives you your gross trailer weight or GTW. Ball weight capacity, also known as tongue weight, or the amount of weight on your hitch ball can be measured by a special scale made for this purpose (Sherline is one manufacturer of a tongue weight scale (http://www.sherline.com/lm.htm)). It can also be measured on a commercial scale; to do this, drive the trailer to the scale so just the hitch part is over the scale. Unhitch the trailer, and check the weight with just the jockey wheel on the scale. Again, you want your trailer fully loaded when you weigh it.
Obviously, if your GTW is too high, your trailer is too heavy to be safely towed by your vehicle. You can imagine the potential problems of braking and/or pulling the load up hill. The problems with too much tongue weight are a little less obvious though. If your ball weight is too high, the trailer will weigh down the back end of your vehicle, raising the front end. This is particularly bad if your vehicle is front wheel drive, but steering and braking will suffer even on a rear wheel drive vehicle.
If your tongue weight is too high, but the total weight is okay, you may just need to reload your trailer. The weight that must be supported by the tongue is anything in front of the front axle of your trailer. Moving cargo back behind that front axle should lower your tongue weight. Remember, even if your GTW is well below your towing capacity, you only want 10-15% of your total weight to be on the tongue. If you cannot change your tongue weight, then you need to look into a weight distributing hitch which will distribute the weight of your trailer over both axles of your vehicle.
So, how much can you tow? Whether it’s horses or snowmobiles, find your gross towing capacity and your ball weight capacity in your vehicle’s owner’s manual, keep your tongue weight at 10-15% of your total weight, and be safe on the road.