Towing Setup & Capacity
Trailer Hitch Class 3 vs Class 4
The classes describe the receiver, not the truck. Fitting a bigger one does not raise what your vehicle is allowed to tow.
By Mike M. ·
How this page is funded: we earn a commission if you buy through our links, at no extra cost to you. It never changes which product we rank first. Prices come from Amazon and are read automatically — each one shows the date it was read. Full disclosure.
Quick picks
The hardware that fits a Class 3 or 4 receiver, by job.
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  Andersen Rapid Hitch Adjustable Ball Mount, 3410 Aluminum body, plate-steel dual ball, six inches of drop or rise. The practical case for it is owning two trailers with different coupler heights and one ball mount. | One mount that fits a trailer and a utility trailer | 7.7/ 10 | |
| 2 |  CURT Chrome Trailer Hitch Ball, 2-5/16 in, 10,000 lb, 40007 A 2-5/16 in ball on a 1 in shank rated to 10,000 lb. If your coupler says 2-5/16, no other size is acceptable, and this is the plain correct answer. | The ball most travel trailers over 5,000 lb actually need | 8.9/ 10 | |
| 3 |  Equal-i-zer 4-Point Sway Control Hitch, 90-00-1001 Four-point sway control built into the head, so there is no friction bar to unclip before you back into a site — the single biggest quality-of-life difference for a first-timer. | Most half-ton trucks pulling a 5,000-10,000 lb trailer | 7.9/ 10 | |
| 4 |  CURT Barbell Hitch Lock, 5/8 in, 23518 A 5/8 in locking pin for a 2 in receiver. Cheap, and it stops the single most casual theft on the list: somebody pulling the clip and walking off with your ball mount. | Replacing the pin and clip on a ball mount you leave in | 6.8/ 10 |
Tap any row to jump to the full write-up. Prices come from Amazon and are read automatically — see each product below for the date.
The short answer
Hitch classes are a classification of the receiver itself — the steel assembly bolted to your vehicle’s frame. They tell you what that part can carry. They do not tell you what your vehicle can tow, and that distinction is the whole of this page.
The classes, side by side
| Class | Receiver | Gross trailer weight | Tongue weight | Typical vehicle |
|---|---|---|---|---|
| Class 1 | 1-1/4 in | 2,000 lb | 200 lb | Compact cars |
| Class 2 | 1-1/4 in | 3,500 lb | 350 lb | Sedans, small crossovers |
| Class 3 | 2 in | 8,000 lb | 800 lb | Mid-size SUVs, half-ton trucks |
| Class 4 | 2 in | 10,000 lb | 1,000 lb | Full-size trucks and SUVs |
| Class 5 | 2 in or 2-1/2 in | 17,000 lb+ | 1,700 lb+ | Three-quarter and one ton |
Note that Class 3 and Class 4 both use a 2 in receiver opening. So a ball mount or weight distribution shank that fits one fits the other — the difference is in the steel, the mounting, and the rating, not the hole. The receiver sizes page has the full dimension table.
The second set of numbers: with weight distribution
Most Class 3 and Class 4 receivers carry two ratings: a weight-carrying rating, and a higher weight-distributing rating. A Class 3 receiver might be 8,000 lb weight-carrying and 12,000 lb weight-distributing.
The reason is the failure mode the lower number protects against. A plain ball mount puts the tongue load on the receiver as a cantilever bending moment. A weight distribution hitch spreads that load across three axles and reduces the moment on the receiver, so the receiver can take a heavier trailer.
Which means: if your trailer is above the receiver’s weight-carrying rating but below its weight-distributing rating, weight distribution is not optional — the receiver is only rated for that trailer with it.
The rule that matters: the lowest rating wins
You have a chain of ratings, and the weakest link is your limit:
- the vehicle’s towing capacity and maximum tongue weight, from the manual;
- the vehicle’s payload, from the door-jamb sticker;
- the receiver’s class rating, stamped on the receiver;
- the ball mount’s rating, stamped on the mount;
- the ball’s rating, stamped on the ball;
- the coupler’s rating, stamped on the coupler.
All six apply simultaneously and the lowest governs. Bolting a Class 4 receiver onto a vehicle rated to tow 5,000 lb gives you a vehicle rated to tow 5,000 lb with a stronger receiver. It does not raise the vehicle’s rating by a pound.
The common mistake
So which do you need?
If your vehicle came with a factory receiver, you almost certainly have what the manufacturer deemed appropriate, and the class is stamped on it along with both ratings. Read it before buying anything.
If you are fitting one, match it to the vehicle’s rating with some margin. Buying Class 4 instead of Class 3 for a vehicle rated to 8,000 lb costs a little more and gives headroom on the part that is easiest to over-spec. There is no downside beyond money and a small amount of weight.
And read the stamp on your coupler too. A trailer with a 5,000 lb coupler is a 5,000 lb trailer regardless of how strong everything in front of it is.
The verdict
Class 3 covers most mid-size SUVs and lighter half-ton towing. Class 4 covers most full-size truck towing with margin. The difference rarely decides anything, because the vehicle’s payload sticker decides first — which is where the three-numbers page comes in.
What to remember
- Classes rate the receiver, not the vehicle.
- Class 3 and Class 4 both use a 2 in receiver opening, so the same mounts fit both.
- Most receivers carry a higher rating with weight distribution than without.
- Six ratings apply at once — vehicle, payload, receiver, mount, ball, coupler — and the lowest governs.
- Upgrading the receiver never raises what the vehicle may tow.
The picks in full
Andersen Rapid Hitch Adjustable Ball Mount, 3410
Andersen Hitches · Best for one mount that fits a trailer and a utility trailer
Aluminum body, plate-steel dual ball, six inches of drop or rise. The practical case for it is owning two trailers with different coupler heights and one ball mount.
Key specifications
- Drop / rise
- 6 in
- Balls
- 2 in and 2-5/16 in plate steel dual ball
- Receiver
- 2 in
- Body
- Aluminum
Capacity figures read from Andersen Rapid Hitch specifications, October 2026.
How it scored
- Rated capacity (25%)8
- Adjustability (25%)9
- Security (20%)6
- Build quality (15%)8
- Price for capability (15%)7
Weighted average of the figures above. We did not test this product — see how we pick.
What it does well
- Flip the ball plate instead of buying a second mount
- Aluminum means you can actually lift it
- Generous drop and rise range
What it is bad at
- Aluminum galls against a steel receiver if you never grease it
- The pin and clip are the weak point for theft unless you add a lock
- Costs as much as three fixed mounts
Price as of October 5, 2026. #ad How this is funded
CURT Chrome Trailer Hitch Ball, 2-5/16 in, 10,000 lb, 40007
CURT · Best for the ball most travel trailers over 5,000 lb actually need
A 2-5/16 in ball on a 1 in shank rated to 10,000 lb. If your coupler says 2-5/16, no other size is acceptable, and this is the plain correct answer.
Key specifications
- Ball diameter
- 2-5/16 in
- Capacity
- 10,000 lb
- Shank
- 1 in diameter x 2-1/4 in long
- Finish
- Chrome
Capacity figures read from CURT hitch ball specifications, October 2026.
How it scored
- How often you use it (40%)9
- Build quality (25%)8
- Takes up little room (20%)9
- Price for capability (15%)10
Weighted average of the figures above. We did not test this product — see how we pick.
What it does well
- Correct size for the majority of mid-size and larger travel trailers
- Cheap enough to keep a spare
- Chrome finish resists the rust that seizes a coupler
What it is bad at
- A 1 in shank will not fit a ball mount drilled for 3/4 in
- Chrome chips, and then it rusts under the chip
- Needs a torque wrench to tighten properly, which most people skip
Price as of October 5, 2026. #ad How this is funded
Equal-i-zer 4-Point Sway Control Hitch, 90-00-1001
Equal-i-zer · Best for most half-ton trucks pulling a 5,000-10,000 lb trailer
Four-point sway control built into the head, so there is no friction bar to unclip before you back into a site — the single biggest quality-of-life difference for a first-timer.
Key specifications
- Trailer weight rating
- 10,000 lb
- Tongue weight rating
- 1,000 lb
- Sway control
- 4-point, integral to the head
- Included
- Weight distribution kit; shank and ball sold separately
Capacity figures read from Equal-i-zer product specifications, October 2026.
How it scored
- Sway control (25%)9
- Tongue-weight range (20%)8
- Backing up (20%)9
- Setup effort (15%)7
- Quietness (10%)5
- Price for capability (10%)7
Weighted average of the figures above. We did not test this product — see how we pick.
What it does well
- Sway control is always on — nothing to remember, nothing to remove
- Back up and turn sharply without unhooking anything
- Bracket height is adjustable in the field with a wrench, not a shop visit
What it is bad at
- It creaks and groans in tight turns; owners report this consistently and it is normal, not a fault
- Needs a shank and ball bought separately, which catches people out on price
- Heavier to lift onto the coupler than a friction-bar setup
Price as of October 5, 2026. #ad How this is funded
CURT Barbell Hitch Lock, 5/8 in, 23518
CURT · Best for replacing the pin and clip on a ball mount you leave in
A 5/8 in locking pin for a 2 in receiver. Cheap, and it stops the single most casual theft on the list: somebody pulling the clip and walking off with your ball mount.
Key specifications
- Pin diameter
- 5/8 in
- Fits
- 2 in receivers
- Type
- Barbell style
- Finish
- Black
Capacity figures read from CURT hitch lock specifications, October 2026.
How it scored
- Security (35%)6
- Fit range (25%)7
- Weather resistance (20%)5
- Everyday usability (10%)9
- Price for capability (10%)10
Weighted average of the figures above. We did not test this product — see how we pick.
What it does well
- The cheapest security upgrade on the whole site
- Barbell shape is harder to lever than a padlock-style pin
- Fits the 2 in receiver on most half-ton trucks
What it is bad at
- 5/8 in only — a 1-1/4 in receiver needs a 1/2 in pin
- The lock cylinder is the first thing to corrode
- Protects the mount, not the trailer
Price as of October 5, 2026. #ad How this is funded
Common questions
Not on the weight-carrying rating, typically 8,000 lb. Many Class 3 receivers have a higher weight-distributing rating that applies only with a weight distribution hitch fitted — and the vehicle’s own rating still governs.
It is stronger — typically 10,000 lb against 8,000 lb. Whether that is better depends on whether the receiver was your limit, which it usually is not: payload runs out first.
On the receiver itself — a stamping on the main tube or a label on the crossmember — with the class and both weight-carrying and weight-distributing ratings.
Sources
- SAE J2807 — tow-vehicle gross combination weight rating procedure — read October 2026
- SAE J684 — trailer couplings, hitches and safety chains — read October 2026
- CURT published towing product specifications — read October 2026
- 49 CFR 393.70 — coupling devices and towing methods — read October 2026