Hitches, Receivers & Ball Mounts
Class 2 vs Class 3 Hitch
This is the one step in the class ladder where the tube size usually changes too - and that changes everything you can bolt to it.
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Short answer
Class 2 usually means a 1-1/4 in receiver; Class 3 usually means 2 in. Beyond the higher ratings, Class 3 opens up a far wider accessory range - weight distribution hitches, most bike racks and cargo carriers assume a 2 in tube.
The accessory ecosystem is the real difference
The capacity step matters, but the practical consequence most owners run into is that 2 in is the size the aftermarket builds for. Adjustable mounts, weight distribution shanks, bike racks, cargo trays and hitch-mounted accessories are overwhelmingly 2 in parts. A 1-1/4 in receiver limits you to a much smaller catalog.
| Class 2 | Class 3 | |
|---|---|---|
| Typical tube | 1-1/4 in | 2 in |
| Typical pin hole | 1/2 in | 5/8 in |
| Weight distribution | Generally not supported | Commonly supported |
| Accessory range | Limited | Very wide |
| Typical vehicles | Cars, crossovers, small SUVs | Half-tons, larger SUVs, vans |
Choosing between them
- A bike rack and nothing else. Class 2 is adequate and lighter. Check the rack's required tube size first.
- A small utility trailer under a few thousand pounds. Class 2 may suffice - compare your loaded trailer weight and tongue weight against the label.
- A camper of any size, or any trailer where you may later want weight distribution. Class 3. Weight distribution hardware generally assumes a 2 in tube.
- Not sure yet. If your vehicle supports a Class 3 part, fitting it costs little extra and removes the question permanently.
Quick picks
Tap any row to jump to the full write-up. How these are chosen - and what we do and do not claim to know - is published in full on our research methodology page.
| # | Product | Best for | Our read | Price |
|---|---|---|---|---|
| 1 |  CURT Loaded Ball Mount with 2 in Ball (2 in drop, 7,500 lb) Class 3 starter | One trailer at a known height | 2 in shank, ball fitted, 7,500 lb | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 2 |  CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop) Class 3 flexibility | Garages with several trailers | Two balls, 6 in of drop | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 3 |  CURT Anti-Rattle Hitch Pin and Shim (2 in receiver) Either class | Killing receiver rattle | Match the pin hole, not the class | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
1. Class 3 starter
CURT Loaded Ball Mount with 2 in Ball (2 in drop, 7,500 lb)
CURT · Best for one trailer at a known height
A one-piece mount with the ball already fitted and torqued, rated to 7,500 lb gross and 750 lb tongue with a 2 in drop. Nothing adjusts, which is exactly why nothing rattles or works loose.
Published specifications
What works
- Arrives with the ball fitted, so there is no torque step to get wrong
- One piece means nothing to loosen or rattle
- Light enough to leave in the receiver or throw in a toolbox
What does not
- The 2 in drop is the only drop - measure before you buy
- 7,500 lb ceiling rules out heavier trailers
Skip it if
Useless on a lifted truck, where a 2 in drop will still leave the trailer nose-high and the weight on the rear axle of the trailer.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
2. Class 3 flexibility
CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop)
CURT · Best for garages with several trailers
One mount that covers two ball sizes and a range of heights, which is the answer when the garage contains a boat trailer, a utility trailer and a camper that all sit at different heights. Capacity drops to the lower-rated ball you are actually using.
Published specifications
What works
- Two ball sizes and a height range in a single mount
- Flipping it gives rise as well as drop
- Rated to 14,000 lb on the larger ball
What does not
- Heavy, and more joints means more places for rattle to start
- The pins and bolts need checking for torque, unlike a one-piece mount
Skip it if
Pointless if you own one trailer and tow it with one truck - a fixed mount at the right height is lighter, quieter and cheaper.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
3. Either class
CURT Anti-Rattle Hitch Pin and Shim (2 in receiver)
CURT · Best for killing receiver rattle
A pin plus a wedge shim that takes the slop out of the gap between a 2 in mount and a 2 in receiver. That gap is a manufacturing tolerance, not a fault, and this is the cheapest thing on the whole site that fixes a real, daily annoyance.
Published specifications
What works
- Removes the clunk over expansion joints for very little money
- Fits in a glovebox and transfers between vehicles
- No modification to the receiver or the mount
What does not
- Does nothing about rattle originating at the coupler or the sway bar
- Listed as superseded, so check the current item number
Skip it if
Not the fix if the noise is coming from a loose ball nut or a worn coupler - find the source first, because a shim will just mask it.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
Key takeaways
- The tube size usually changes at this step, unlike Class 3 to Class 4.
- 2 in is the size the accessory market is built around.
- Weight distribution generally needs a 2 in receiver.
- If your vehicle supports Class 3, it is usually the better buy.
How we sourced this
Every figure on this page came from one of the following, each fetched while the page was written. Where a manufacturer or regulator does not publish a number, we say so rather than estimate it.
Common questions
- Can I put a 2 in adapter in a 1-1/4 in receiver?
- Adapters exist and we would not use one for towing. They put a larger, higher-leverage accessory onto a receiver rated for far less, and the adapter becomes a stress concentration.
- Is Class 2 enough for a small camper?
- Check the loaded weight and tongue weight against the label. Many small campers exceed Class 2 ratings once loaded, and almost none support weight distribution on a 1-1/4 in tube.
- Will my car take a Class 3?
- Depends entirely on the frame or subframe structure. Use the manufacturer's fit guide for your vehicle - where only Class 2 is offered, that is a structural judgment.
More in Hitches, Receivers & Ball Mounts
Class, receiver size, ball diameter, drop. Four numbers decide whether your setup is right, and three of them are stamped on parts you already own.
Read next
Reference
Hitch Classes Explained
The class system from 1 to 5, the two ratings on every label, and the mistake of inferring capacity from tube size.
Head to head
Class 3 vs Class 4
What actually separates the two classes, and the common situation where upgrading the receiver changes nothing.
Reference
Receiver Sizes Chart
Tube sizes, pin hole diameters, what fits what, and the derating that comes with a reducer sleeve.
Guide
Do I Need a WD Hitch?
The three-check test that answers the question definitively, plus the cases where the answer is a clear no.
Found something out of date, or a figure you can source better than we did? Corrections get read first. How we research explains how these pages are put together, and contact is one click away.