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What Size Hitch Ball for a Travel Trailer?

Full breakdown: best hitches and weight distribution.

Quick answer: Most travel trailers use a 2 in or a 2-5/16 in ball, and they can weigh 5,000 to 10,000 lb or more (CURT hitch balls). Most weight-distribution hitches come with a 2-5/16 in ball. Match the coupler first. Tongue weight should be about 10 to 15 percent of gross trailer weight: 500 to 750 lb on a 5,000 lb trailer, and 1,000 to 1,500 lb on a 10,000 lb trailer (CURT tongue weight).

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2-5/16 in trailer hitch balls

Travel trailer ball and tongue figures

FigureValueSource
Travel trailer ball diameters2 in or 2-5/16 inCURT hitch balls
Travel trailer weight5,000 to 10,000 lb or moreCURT hitch balls
2 in ball gross rating3,500 to 12,000 lbCURT hitch balls
2-5/16 in ball gross rating6,000 to 30,000 lbCURT hitch balls
Weight-distribution hitch ball2-5/16 in on mostCURT hitch balls
Tongue weight at 10 and 15 percent of 5,000 lb500 lb and 750 lbCURT tongue weight
Tongue weight at 10 and 15 percent of 10,000 lb1,000 lb and 1,500 lbCURT tongue weight
Class 3 weight-carryingup to 8,000 lb gross, up to 800 lb tongueCURT hitch classes
Class 4 weight-carryingup to 10,000 lb gross, up to 1,000 lb tongueCURT hitch classes
Class 3 or 4 with weight distributionup to 12,000 lb gross, up to 1,200 lb tongueCURT hitch classes
Brakes and breakaway switchmore than 1,500 lb loadedNHTSA towing safety

The band in general is how much tongue weight is safe. How to measure a tongue in this range is the tongue weight guide.

How to size it

Read the coupler before you read the hitch box. Most travel trailers are on a 2 in or 2-5/16 in ball, and the stamp is the specification (CURT hitch balls). The 2 in chart is 3,500 to 12,000 lb. The 2-5/16 in chart is 6,000 to 30,000 lb. A 5,000 lb trailer is inside the 2 in chart and below the start of the 2-5/16 in chart. A 10,000 lb trailer is inside both. "Or more" has no upper figure on the source, so a trailer over 10,000 lb needs its own scale ticket before you leave these two rows.

Ten percent of 5,000 lb is 500 lb and 15 percent is 750 lb. Ten percent of 10,000 lb is 1,000 lb and 15 percent is 1,500 lb (CURT tongue weight). Under 10 percent the trailer may sway. Over 15 percent the vehicle is less responsive, especially turning and braking. On the class chart, 750 lb is under the Class 3 tongue limit of 800 lb, and 5,000 lb is under the Class 3 gross limit of 8,000 lb (CURT hitch classes). At 10,000 lb you are on the Class 4 gross limit and on its 1,000 lb tongue limit, while 1,500 lb of tongue is over the 1,200 lb weight-distribution tongue limit. Single-weight writeups: 5,000 lb, 7,000 lb, and 10,000 lb.

If you are buying the weight-distribution hitch rather than only the ball, most of those hitches include a 2-5/16 in ball (CURT hitch balls). The coupler still has to be 2-5/16 in. Class 3 and Class 4 with that hitch are rated up to 12,000 lb and up to 1,200 lb of tongue (CURT hitch classes). The hitch does not raise the vehicle's rating. Shank check, briefly: a 2-5/16 in ball uses a shank length of 2-1/8 to 3-1/2 in and a shank diameter of 1 to 2 in, and the shank has to fit the mount. A reducer bushing covers a shank that is too small. The gross rating on the ball has to exceed the trailer, and it varies by part number.

Ball mounts for a 2 in receiver

Travel trailers in the 5,000 to 10,000 lb range are over 1,500 lb loaded, where many states require a separate braking system and a breakaway switch (NHTSA towing safety). Electric brakes need an in-cab controller and wiring. Weigh the loaded trailer at a public scale so the 10 to 15 percent math uses the real gross weight. A weight-distribution hitch transfers tongue weight toward the front axle; it is not a substitute for brakes.

Trailer coupler locks

Owner's manual next: GVWR, maximum trailer weight, maximum tongue weight, GCWR, and GAWR, with a hitch that can handle the same specifications (NHTSA towing safety). Lowest-rated component wins, and no hitch increases what the vehicle can tow (CURT hitch classes). Towing capacity explained and the trailer tow calculator are the vehicle-side checks.

Related

FAQ

What ball size do travel trailers use?

Most use a 2 in or a 2-5/16 in ball (https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more). Match the coupler. A 2 in ball is listed at 3,500 to 12,000 lb. A 2-5/16 in ball is listed at 6,000 to 30,000 lb.

How heavy is a travel trailer on this chart?

CURT says travel trailers can weigh 5,000 to 10,000 lb or more (https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more). Ten percent of 5,000 lb is 500 lb and 15 percent is 750 lb. Ten percent of 10,000 lb is 1,000 lb and 15 percent is 1,500 lb (https://www.curtmfg.com/trailer-parts/couplers/learn-more).

Why do weight-distribution hitches come with a 2-5/16 in ball?

That is the standard ball CURT says most weight-distribution hitches include (https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more). Class 3 and Class 4 with weight distribution are rated up to 12,000 lb gross and up to 1,200 lb of tongue weight (https://www.curtmfg.com/types-trailer-hitches). You still match the coupler on the trailer.

Does the ball rating replace tongue weight?

No. The ball rating is gross trailer weight and must exceed the trailer (https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more). Tongue weight is about 10 to 15 percent of that gross weight (https://www.curtmfg.com/trailer-parts/couplers/learn-more). Under 10 percent the trailer may sway.

Compiled with AI assistance from the sources below. Spot an error? Email jpanasuk@gmail.com.

Sources