Trailer Hitch Receiver Sizes

Trailer hitch receivers are available in 4 main sizes: 1-1/4", 2", 2-1/2", and 3". These numbers refer to the width of the receiver openings.

Below, we'll go over the standard hitch receiver sizes and their capabilities. You can also read more about trailer hitch weight capacities in our article, How to Choose the Right Trailer Hitch Class.

NOTE:

To determine the size of your trailer hitch, simply measure the height and width of its opening. The two most common sizes of trailer hitch receivers are 1-1/4" and 2".

Draw-Tite 1-1/4 Inch Trailer Hitch Receiver - Jeep Wrangler JL

Class I Curt Trailer Hitch On Honda Civic

1-1/4" - Class I and Class II Hitches

Class I and Class II trailer hitches typically have a 1-1/4" x 1-1/4" receiver opening. These hitches are most often found on passenger cars and smaller SUVs. There are a few Class II hitches that have 2" x 2" receiver openings, but this is not common.

Typical weight ratings for Class I trailer hitches:

Maximum gross trailer weight: 1,000 lbs to 2,000 lbs
Maximum tongue weight: 100 lbs to 200 lbs

Typical weight ratings for Class II trailer hitches:

Maximum gross trailer weight: 2,000 lbs to 3,500 lbs
Maximum tongue weight: 200 lbs to 525 lbs

Why won't my 1-1/4" accessories fit in my 1-1/4" receiver opening?

You might think that any hitch accessory with a 1-1/4" x 1-1/4" shank would work in either a Class I or Class II trailer hitch, but this is not the case.

Many hitch accessories are designed to maximize the weight carrying capabilities of the trailer hitches they're used with. To keep you from overloading your Class I hitch, Class II hitch accessories—such as drawbars, bike racks, and cargo carriers—will not fit into Class I hitches.

Manufacturers accomplish this by placing a stopper in the back of Class I hitch receivers so that drawbars and accessory shanks can only slide into the trailer hitch opening up to that point. On hitch accessories designed for Class II trailer hitches, the shank that slides into the hitch opening is longer. When this longer shank slides into a Class I hitch, it will hit the stopper, preventing the pin hole on the hitch from lining up with the pin hole on the accessory.

Class I hitch accessories—drawbars, bike racks and cargo carriers— are designed to fit into your Class I hitch perfectly. These accessories will work in Class II trailer hitches as well. Decorative hitch covers listed for the 1-1/4" hitch size will also work in both Class I and Class II trailer hitches.

Valley 2-Inch Trailer Hitch Receiver - Dodge Dakota pickup

Valley 2-Inch Trailer Hitch Receiver - Jeep Grand Cherokee

2" - Class III and Class IV Hitches

2" x 2" trailer hitch receivers are the most common type. Most 2" hitches are either Class III or Class IV. These hitches are typically found on pickup trucks, SUVs, and some full-size sedans. Most trucks and SUVs that come factory-equipped with a trailer hitch have a 2" receiver.

Many 2" hitches are also rated for use with weight-distribution systems. By using a weight-distribution system while towing, you can maximize the full weight carrying potential of your hitch.

Typical weight ratings for Class III trailer hitches:

Maximum gross trailer weight: 3,500 lbs to 8,000 lbs
Maximum tongue weight: 300 lbs to 800 lbs

Typical weight ratings for Class IV trailer hitches:

Maximum gross trailer weight: 5,000 lbs to 12,000 lbs
Maximum tongue weight: 500 lbs to 1,200 lbs

Heavy-Duty 2" Trailer Hitches

Some 2" trailer hitch receivers are categorized as Class V hitches because of their increased weight capacity. The construction of these hitches allows them to carry more weight than a typical 2" hitch, making them perfect for heavy-duty towing applications.

For instance, Draw-Tite makes a Class V hitch with a cast center section so that it not only has a higher overall weight capacity, but it also has the highest tongue weight rating possible. The reinforced center sections on these hitches enable them to handle far more than just 10 percent of the gross trailer weight, which is a typical tongue weight capacity.

Factory 2" Trailer Hitch Variances

Of those vehicles that come from the factory with 2" hitches, some have slight variances in the construction of the hitch. For example, the 2" hitch receivers on Toyota Tundra pickups are built of thick tubing. As a result, some flush-mounted trailer hitch locks that designed for typical 2" hitches will not fit because their spans are not long enough.

TorkLift Class V 2-1/2-Inch Trailer Hitch Receiver

2-1/2" - Class V Hitches

Trailer hitch receivers that measure 2-1/2" are designed for use on heavy-duty trucks that can handle extreme capacities. Hitches of this size are classified as Class V hitches. Some trucks come with factory 2-1/2" receivers, but you can also purchase these hitches as aftermarket additions.

Hitch accessories designed for 2" trailer hitches will work with 2-1/2" hitches with the use of a specialized hitch adapter. Most Class V hitches are rated for use with weight-distribution systems so that you can maximize their weight-carrying ability.

Typical weight ratings for Class V 2-1/2" trailer hitches:

Maximum gross trailer weight: 10,000 lbs to 20,000 lbs
Maximum tongue weight: 1,000 lbs to 2,000 lbs

Curt HD Class V Ball Mount for 3-Inch Hitches

3" - Class V Hitches

These heavy-duty Class V hitches are starting to appear on newer-model trucks straight from the factory. You can also purchase 3" hitches as aftermarket additions. These hitches must typically be welded to the C-channel frame of your vehicle and are ideal for use with dump trailers, flatbeds, etc. Unlike most other hitches, these are not vehicle specific.

Adapters for 3" hitches are available to adapt the 3" opening to a more standard 2" or 2-1/2" opening. You can also find weight distribution systems compatible with 3" hitches, though this hitch size is less common than other types, so your options will be more limited.

Typical weight ratings for Class V 3" trailer hitches:

Maximum gross trailer weight: 20,000 lbs to 25,000 lbs
Maximum tongue weight: 3,000 lbs to 4,000 lbs

Reese Class I Trailer Hitch Receiver with Rectangular Opening

Uncommonly Sized Trailer Hitches

Rectangular hitch receivers are the least common type. Hidden Hitch and Reese no longer manufacturer these receivers, which were previously Class I and Class II hitches designed for smaller cars. There are no hitch accessories available to slide directly into a rectangular hitch opening.

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Questions and Comments about this Article

Mognum 10/17/2020

I have a Thule T2 Classic bike rack. Can I add an adapter that allows me to connect a hitch cargo basket (52x18 MaxxTow Cargo Carrier for 2" Hitch) rather than the T2 2 bike extension? Bike carrier near the car with cargo carrier connected to the bike carrier? Thanks. 102267

Reply from Jon G. 10/19/2020

The only way you'll be able to accomplish this is by using a bike rack that is designed for this type of application, like the Hollywood Racks Sport Rider SE2 # HR1450Z-85 . Thule doesn't have a bike rack designed for this so there are no adapters for a cargo carrier for your application. 75328

Sylvia 9/29/2020

I have a Honda H-RV with a class 1 hitch. I want a bike rack for two bikes, but although the rack I want fits my hitch fine (tried it on!), the rack is only rated for a class 2 hitch. Can I either adapt my class 1 or is there a class 2 I can install on my H-RV? Thank you so much :) 101607

Reply from Jon G. 9/30/2020

Great question! Class I and Class II hitches generally use the 1-1/4" receiver so it does make sense why your bike rack fits your hitch. The reason why some bike racks are only rated for a Class II hitch is usually because of where the hitch pin hole lies on the hitch receiver of a Class I hitch. For some reason the hitch pin hole typically sits closer to the opening and doesn't allow enough of the shank of the bike rack to make contact with the receiver. You can technically use your bike rack with your hitch because it physically fits, but if your hitch receiver or bike rack were to become damaged I doubt the warranty would hold up. Here is a link to all of our bike racks that are rated for a Class I hitch in case you wanted to go that route. 74999

Helpful Links

dept-pg-hitch_bike_racks-hs-class_1.aspx

Michelle S. 8/1/2020

I have a 2003 Mitsubishi Outlander LS that currently does not have a hitch What would you recommend to attach a cargo carrier with a 2” sleeve? Ty! 96055

Reply from Jon G. 8/11/2020

I recommend the Curt Class II Hitch # C12293 , The only problem is that this has a 1-1/4" receiver so you'll need to use an adapter # MT70032 to accomplish this. Since this will reduce the weight rating of the trailer hitch by 50% it would be better to go with a cargo carrier that is compatible directly with a 1-1/4" receiver, like part # 63155 , but it's completely up to you. 70950

Helpful Links

dept-pg-hitch_cargo_carrier-pc-fits_1~1%7c4_inch_hitch.aspx

Mt 5/28/2020

what is FHK stands for some companies hitches? 77870

Reply from Chris R. 6/1/2020

I believe the FHK is just a part number designation that some manufacturers use (from my research it looks like Meyer Products). It doesn't refer to any specific feature or characteristic on the hitch itself. 63392

Reply from Mt 6/1/2020

@ChrisR Thank you for the response. After some memory digging I remember that FHK=Front Hitch Kit 63396

Charles A. 5/9/2020

We have a Tahoe Wide lite Trailer and want to put a bolt on hitch on the back so we could tow a cargo trailer with a Razor. What would you recommend? 76047

Reply from Chris R. 5/12/2020

For your Tahoe Trailer the best option is an adjustable hitch like the Curt # C13701 . As long as the Wide Lite has a frame width between 18" and 51", this will work perfectly as either a bolt-on or weld-on (for a no-drill install) application. It will provide you with a 2" receiver and it has more than enough capacity for a small cargo trailer with your loaded Razor. 62138

Garyf. 4/2/2020

I have converted my 1988 harley davidson FlHTC wide glide into a Trike, I plan on towing a small trailer across country. I imagine the trailer will weigh approx. 250- 300 lbs. fully loaded. Not to sure about that. If this is the case, would a 1-1/4 hitch do the job? Bye the way, Your Site has alot of good information for the products you have here.. 72205

Reply from Chris R. 4/3/2020

Thanks for the kind words! A 1-1/4" hitch receiver would have more than enough capacity for a 300 pound trailer. There's no reason you would need a larger 2" hitch for this application. 59214

Wendy W. 3/18/2020

Can I get a reducer from a 2 down to a 1.25 to carry a bike rack? 71417

Reply from Chris R. 3/19/2020

Sure can! The Brophy Hitch Reducer # HT02 will work perfectly for your application. It'll slide into the 2" receiver on your vehicle to provide a 1-1/4" opening for your bike rack. 58316

Helpful Links

Hitch-Adapters/Brophy/HT02.html