What Is Tongue Weight?
Tongue weight is the downward force the trailer exerts on the hitch ball. It should be 10-15% of the total loaded trailer weight. Too little tongue weight causes trailer sway. Too much overloads the rear axle and lifts the front of the tow vehicle, reducing steering control.
Tongue Weight by Trailer Type
| Trailer Type | Typical GTW | Target Tongue Weight |
|---|---|---|
| Small utility trailer | 1,000 - 2,500 lbs | 100 - 375 lbs |
| Boat trailer | 2,000 - 6,000 lbs | 200 - 900 lbs |
| Travel trailer | 3,500 - 8,000 lbs | 350 - 1,200 lbs |
| Car hauler | 5,000 - 10,000 lbs | 500 - 1,500 lbs |
| Fifth-wheel RV | 8,000 - 16,000 lbs | 1,200 - 2,400 lbs (15-25%) |
Hitch Classes and Tongue Weight Ratings
| Hitch Class | GTW Rating | Tongue Weight Rating | Typical Use |
|---|---|---|---|
| Class I | Up to 2,000 lbs | 200 lbs | Bike racks, small trailers |
| Class II | Up to 3,500 lbs | 350 lbs | Small boats, utility trailers |
| Class III | Up to 8,000 lbs | 800 lbs | Boats, campers, car haulers |
| Class IV | Up to 12,000 lbs | 1,200 lbs | Large RVs, heavy equipment |
| Class V | Up to 17,000 lbs | 1,700 lbs | Commercial towing |
FAQ
How do I measure tongue weight?
Use a tongue weight scale placed under the trailer coupler. They cost $30-$80 and give accurate readings. Alternatively, use a bathroom scale with a pipe setup, but dedicated tongue weight scales are more reliable and easier to use.
What happens if tongue weight is too low?
If tongue weight drops below 10% of total trailer weight, the trailer becomes tail-heavy and prone to dangerous swaying, especially at highway speeds or in crosswinds. This is the leading cause of trailer accidents.
Does a weight distribution hitch change tongue weight?
A weight distribution hitch does not change the actual tongue weight. It redistributes the tongue weight more evenly across the tow vehicle's axles and the trailer axles. The tongue weight at the ball remains the same, but the tow vehicle handles better.
⚠ Important Safety Notice
Tongue weight estimates are for planning only. Actual tongue weight varies with load distribution. Always weigh your trailer tongue at a certified scale. Incorrect tongue weight causes dangerous trailer sway. Never exceed your hitch receiver's rated capacity. Consult your vehicle and hitch manufacturer specifications.