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What Size Hitch Do I Need for a 3,500 lb Trailer?

Full breakdown: what size hitch for my trailer.

Quick answer: 3,500 lb is the Class 2 gross maximum, and 10 percent of 3,500 lb is 350 lb, which is also the Class 2 tongue maximum (CURT hitch classes, CURT tongue weight). Fifteen percent is 525 lb (CURT tongue weight). That figure is over 350 lb and under the Class 3 tongue limit of 800 lb, and Class 3's gross limit is 8,000 lb on a 2 in receiver (CURT hitch classes). Class 2 is the max; Class 3 is the margin.

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Class 3 trailer hitch receivers

Figures for a 3,500 lb trailer

Figure	Value	Source
Class 2 gross trailer weight	up to 3,500 lb	CURT hitch classes
Class 2 tongue weight	up to 350 lb	CURT hitch classes
Class 2 receiver	1-1/4 in	CURT hitch classes
Class 3 gross trailer weight	up to 8,000 lb	CURT hitch classes
Class 3 tongue weight	up to 800 lb	CURT hitch classes
Class 3 receiver	2 in	CURT hitch classes
Class 3 weight-distribution gross	up to 12,000 lb	CURT hitch classes
Class 3 weight-distribution tongue	up to 1,200 lb	CURT hitch classes
Tongue weight at 10 percent of 3,500 lb	350 lb	CURT tongue weight
Tongue weight at 15 percent of 3,500 lb	525 lb	CURT tongue weight
1-7/8 in ball, gross rating	2,000 to 3,500 lb	CURT hitch balls
2 in ball, gross rating	3,500 to 12,000 lb	CURT hitch balls
Brakes and breakaway switch	more than 1,500 lb loaded	NHTSA towing safety

For the band without the hitch chart, use how much tongue weight is safe. For the scale and the lever, use the tongue weight guide.

How to size it

Confirm the 3,500 lb figure is the trailer loaded for the trip. Weigh it at a public scale rather than trusting a dry rating (NHTSA towing safety).

Ten percent of 3,500 lb is 350 lb. Fifteen percent of 3,500 lb is 525 lb (CURT tongue weight). Below 350 lb you are under 10 percent and the trailer may sway. Above 525 lb you are over 15 percent and steering and braking responses drop off.

Class 2 can accept 350 lb of tongue and cannot accept 525 lb (CURT hitch classes). Class 3 can accept 525 lb because its tongue limit is 800 lb. You do not need the Class 3 weight-distribution rating (12,000 lb gross and 1,200 lb tongue) to cover 525 lb. What you do need, if you leave Class 2, is the 2 in receiver. Class 2's opening is 1-1/4 in. CURT lists Class 2 for cars, crossovers, and minivans.

Match the coupler first. This weight is the shared edge of the ball chart: 1-7/8 in runs up to 3,500 lb and 2 in starts at 3,500 lb (CURT hitch balls). The ball's gross rating must exceed the trailer. A part stamped 3,500 lb does not clear that test on a 3,500 lb trailer. Ratings vary by part number.

2 in trailer hitch balls for a 3,500 lb trailer

Many states require brakes and a breakaway switch once loaded weight is more than 1,500 lb (NHTSA towing safety). At the Class 2 maximum you are past that line. Cross the safety chains under the tongue, with slack for turns and no drag. Most states require the chains.

Trailer safety chains

A minivan or crossover that came with a Class 2 hitch is not upgraded by bolting on a Class 3 number. Read GVWR, maximum trailer weight, maximum tongue weight, GCWR, and GAWR, and match the hitch to those specifications (NHTSA towing safety). Lowest-rated component wins, and no hitch increases what the vehicle can tow (CURT hitch classes). Walk through the limits on towing capacity explained, and check them in the trailer tow calculator.

Both 350 lb and 525 lb are over 300 lb, so a bathroom scale is not the direct method. One sourced alternative is a vehicle scale: weigh the vehicle and trailer with the trailer wheels off the scale, then subtract the vehicle alone (CURT tongue weight).

FAQ

Is 3,500 lb the top of Class 2?

Yes. Class 2 is rated up to 3,500 lb gross and up to 350 lb of tongue weight (https://www.curtmfg.com/types-trailer-hitches). Ten percent of 3,500 lb is 350 lb (https://www.curtmfg.com/trailer-parts/couplers/learn-more), so the gross rating and the 10 percent tongue land on the Class 2 limits together.

Why move to Class 3 for margin?

Fifteen percent of 3,500 lb is 525 lb, and Class 2 stops at 350 lb of tongue weight. Class 3 is rated up to 8,000 lb gross and up to 800 lb of tongue weight (https://www.curtmfg.com/types-trailer-hitches). The 525 lb figure fits under 800 lb. Class 3 uses a 2 in receiver, not the 1-1/4 in receiver on Class 2.

1-7/8 in or 2 in ball at this weight?

Both charts meet at 3,500 lb. A 1-7/8 in ball is listed up to 3,500 lb, and a 2 in ball is listed from 3,500 lb (https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more). Match the coupler first. A ball rated at exactly 3,500 lb does not exceed a 3,500 lb trailer.

Are brakes required?

Many states require a separate braking system and a breakaway switch for a loaded trailer over 1,500 lb (https://dmna.ny.gov/nynm/training/NHTSA_TowingSafety.pdf). A 3,500 lb loaded trailer is over 1,500 lb.

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

Sources

CURT Manufacturing, "Types of Trailer Hitches & Hitch Classes" (Towing 101). https://www.curtmfg.com/types-trailer-hitches. Accessed Oct 2, 2026.
CURT, "Standard Trailer Hitch Ball Sizes | How to Choose". https://www.curtmfg.com/towing-accessories/trailer-balls/learn-more. Accessed Oct 2, 2026.
CURT, "How to Measure Tongue Weight". https://www.curtmfg.com/trailer-parts/couplers/learn-more. Accessed Oct 2, 2026.
NHTSA, "Towing a Trailer: Being Equipped for Safety" (copy hosted by NY DMNA). https://dmna.ny.gov/nynm/training/NHTSA_TowingSafety.pdf. Accessed Oct 2, 2026.