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Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long

Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long

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Transform your 1-1/4" trailer hitch receiver (Class II only) into a 2" one with this adapter from Curt. It slides into your existing hitch receiver so you can easily carry a 2" bike rack or other hitch-mounted accessory. Call 800-298-1624 to order CURT hitch adapters part number C45785 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long. Hitch Adapters reviews from real customers.
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  • Reviews (77)
  • Q & A (0)
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  • Why etrailer?

CURT Hitch Adapters

  • Hitch Expander
  • Fits 1-1/4 Inch Hitch
  • 6 In Extension
  • 1-1/4 Inch to 2 Inch
  • Bike Racks
  • Cargo Carriers
  • Hitch Mounted Accessories
  • CURT

Transform your 1-1/4" trailer hitch receiver (Class II only) into a 2" one with this adapter from Curt. It slides into your existing hitch receiver so you can easily carry a 2" bike rack or other hitch-mounted accessory.


  • Hitch adapter turns your 1-1/4" Class II trailer hitch receiver into a 2" receiver so that you can mount a bike rack, cargo carrier or other 2" hitch accessory
  • Extended length allows your hitch-mounted accessory to clear your bumper
  • Strong, steel construction
    • Solid 1-1/4" shank
  • Gloss black powder coat finish offers superior rust resistance


  • Application: 1-1/4" x 1-1/4" trailer hitch receivers
    • Fits Class II hitches only
  • Receiver size: 2" x 2"
  • Maximum tongue weight: 350 lbs
  • Length: 6" from center of hitch pin hole to center of hitch pin hole
  • Overall length: 10"
  • Pin hole diameters:
    • 1-1/4" Receiver: 1/2"
    • 2" Receiver: 5/8"
  • 1-Year limited warranty

Note: Using this adapter will reduce your hitch's weight capacity by 50 percent. Do not use this hitch adapter in towing applications or for snow plow attachments.

45785 Curt Hitch Extender for 1-1/4" Trailer Hitch Receivers - 6" Long

Item # C45785

Customer Reviews

Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long - C45785

Average Customer Rating:  4.7 out of 5 stars   (77 Customer Reviews)

Transform your 1-1/4" trailer hitch receiver (Class II only) into a 2" one with this adapter from Curt. It slides into your existing hitch receiver so you can easily carry a 2" bike rack or other hitch-mounted accessory.

- C45785

The Curt C45785 1.25 inch to 2 inch hitch adapter seems well-constructed, but does NOT fit the current SPA Volvo OEM 1.25 inch automatic retractable hitch receptacle (mine is on a 2020 V60 Cross country). The lock pin hole doesn't go back far enough to accommodate the pin -- see photo.

Thanks for the feedback. Looks like you need one a tad bit bigger like item # MT70032
MaxxTow Trailer Hitch Receiver Adapter 1-1/4" (Class I or II) to 2" Hitch - 11" Long
-- Etrailer Expert Sierra K - 11/23/2021

- C45785

Wish I had known that it didn't come with a pin to lock it in place, but I had one from another bike rack. Only other issue is the excessively tight fit in the receiver, but prefer that over too loose. Is a solid piece of metal and looks like it will hold up well.

It sounds like you need a 2 hitch pin for the 2 portion of this adapter. For that I recommend locking pin part # e98880
etrailer Trailer Hitch Receiver Lock for 2" Hitches - Flush - 2-5/8" Span - Chrome
to help protect your setup. If you needed a pin for the 1-14 side of the adapter I recommend part # e98879
etrailer Trailer Hitch Receiver Lock for 1-1/4" Hitches - Flush - 2-1/8" Span - Chrome
. You can also get these keyed alike.
-- Etrailer Expert Heather A - 09/22/2021

- C45785

Solid heavy duty steel. Fits snugly into hitch.

Works great. Easy to attach and remove. Secure mount.
William - 09/20/2019

- C45785

Works Fantastic

- C45785

Really good product easy to install, fast shipping keep up the hard work thank you I will continue buying from

- C45785

Still works a year later, just as expec ted!

Still works as expected
Jeffrey W - 03/29/2022

- C45785

Nice quality.

- C45785

Great product. Perfect for my 2014 Mini Countryman S with 1-1/4" receiver paired with my Allen bike rack (2" opening). Thank you etrailer.

- C45785

The hitch adapter and 90 degree mount solved my desire to mount my electric wench on my auto trailer replacing the manual wench. See photo. The 2" sleeve would not come out of the existing 2" receiver so I used the hitch adapter to make the transition. The etrailer experts correctly told me there would be some play in this joint. However, it works here (as this is not for towing). I also used the 90 degree mount upside down (also not an approved application). But again no towing is involved. I did need to drill a new hole in the receiver.

- C45785

I purchased the Curt Trailer Hitch Receiver Adapter (C45785), the Hitch Pin 1/2" x 3 1/2 (12H), and the MaxxTow Hitch Pin and Clip with Oversize Grip - 2" Hitches - 5/8" Diameter - 3-5/8" Long (MT70053). They arrived earlier then expected and work perfectly! The quality is better then I expected. Thank You!!!

- C45785

It has worked as expected for a year. I attach a bike tray rack that weights about 40 pounds and two bikes which weigh about 30 pounds each and use this on several multi-week mountain bike road trips in the southwestern U.S. I go on some rather rough roads.

- C45785

While this seems to be a sturdy, well-made product, it is not the optimum set-up for a Subaru Outback equipped with a factory-installed 1.25" hitch. Quite simply, the pin hole drilled in the 1.25" section is not where it should be. In order for it to line up with the hole in the Subaru hitch, the hole would need to be another 1.5" or so closer to the "rear". Not that this doesn't work, for it does--- but with the unit sticking out yet another 1.5" or so from the hitch. To remedy this, I drilled another half inch hole into the unit where it should be located. Now it works great, but it took considerable effort (and a $20 titanium drill bit) to get it right. Again, this unit will work in a Subaru Outback without drilling another hole in it; it's just not optimal.

- C45785

Heavy steel and as pictured. The two inch interfaces very loosely compared to my other hitch with same bike rack. Rattling down the road I'll go! Also, in case you are interested the adapter DOES NOT come with a pin (That's a separate purchase and a bit of a surprise). I'm weighing the purchase of a 1 1/4" rack to snug things up as I ride daily. If so check my recycling bin for this gem.

- C45785

This works great with my hitch to extend out behind my car and also expand to the 2” size for by bike rack. The fit was just slightly loose so I put a couple of strips of duct tape on 2 sides to eliminate the “play” inside the hitch. Works perfectly.

Please be aware that using the adapter/extender will reduce the tongue weight capacity of your hitch by half.
-- Etrailer Expert Mike L - 09/04/2018

- C45785


- C45785

used this to convert to a standard hitch on ATV so I didn't need to buy unique for it....remember it is only as strong as the weakest portion and that would be this adapter...but it works for me to move the boat around.

- C45785

No complaints. I've only used it a couple of times as we have changed our bike rack to work with the smaller hitch, but when we do need to carry more bikes on the larger rack this adapter does the trick.

- C45785

Packaged extremely well, order shipped quickly and arrived in perfect condition.

- C45785

Does not fit the 1 1/4 receiver on our standard, factory-installed hitch on 2010 Ford Escape. Width of the 11/4” bar seems OK. Height is oversize and on one side is about 1/32 over size. From an end view the bar even looks slightly out of square. Bought a 1 1/4” Curt Ball mount from eTrailer recently for the same vehicle that fits perfectly. But will have to return this adaptor.

- C45785

I have a car with 2" hitch and one with 1.25" hitch. This is a great adapter and less expensive than buying two bicycle racks to fit 2" and 1.25" hitches. Adapter is short enough and fit is good enough that it doesn't wobble too much.

- C45785

Great product.

- C45785

Great service and speedy delivery. Have not had to use it yet because of other issues associated with new bike rack but I really appreciate the extremely comprehensive selection of hitch related items.

- C45785

I have made 3-4 purchases from etrailer and I am always completely satisfied with the quality of the items. The items always arrive by or before the date promised. This is my first stop when looking for parts and their videos are extremely helpful.

- C45785

Installed this adapter so we could use a bike rack that we have been using on my truck (2 inch), and cancelled the need of buying a new bike rack. Works perfectly.

- C45785

Fit really tight into the vehicle hitch which was nice, no rattles. Also liked that is not very long preventing the basket that we placed on it from extending out very far.

Show More Reviews

Ask the Experts about this CURT Hitch Adapters

  • Will Trailer Hitch Adapter Reduce Tongue Weight Rating Of A Vehicle?
    You are correct that the Curt Trailer Hitch Receiver Adapter # C45785 you were looking at will reduce the capacity of your trailer hitch receiver by 50%. This will not necessarily reduce the tongue weight rating of your vehicle, as the hitch manufacturers test the hitches independently of the vehicle and have not tested the effects on a specific vehicle. With that said I would reach out to the manufacturer of your vehicle to get there input on this, but until then I would error on the...
    view full answer...
  • 1-1/4 inch to 2 inch Hitch Adapter that Bike Rack with 3 inch Long Shank Fits
    I have a solution for you, but the distance from the hitch pin hole of the Curt adapter part # C45785 to the back of the hitch opening is 2.55 inches so it would not be deep enough for your bike rack. Instead we have the Brophy hitch adapter part # HTAD which has a distance of 3-1/8 inches from the pin hole to back of the hitch opening so it would be your best option.
    view full answer...
    Image 1 for
  • Is My Trailer Hitch Supposed To Be Under My Subaru Bumper?
    For your 2003 Subaru Outback Wagon this generation does have a recessed location for trailer hitches. You could try the Curt Trailer Hitch Receiver Adapter # C45785 it will extend your receiver past the bumper, please note that it will decrease load capacity by 50% so make sure that you stay under 150 pounds for your Draw-Tite Trailer Hitch Receiver # 36284 and you will be fine.
    view full answer...
  • Flat Towing With a 1-1/4" Hitch Receiver
    I do have an option that will allow for you to use your 2017 Subaru Outback to flat tow a 1972 Volkswagen Beetle, however, none of the 1-1/4" to 2" hitch adapters are rated for towing applications. Instead, you will need to use a 2" hitch receiver like the Draw-Tite Max-Frame Trailer Hitch Receiver part # 75673 as this has a 2" receiver tube opening. You may also need a high low adapter depending on your application. In order to determine this, you will need to measure from the ground...
    view full answer...
  • Difference Between Curt and Tow Ready 1-1/4 inch to 2 inch Hitch Adapters
    Realistically there isn't much difference between the two extenders you referenced aside from price. Both are extenders that go from 1-1/4 to 2 inch and are both right at 6 inches in length. If it were me I would go with the Curt # C45785 over the Tow Ready part # 80303.
    view full answer...
  • Hitch Expander from 1-1/4 Inch to 2 Inch for Bike Rack on 5th Wheel
    A 1-1/4 inch hitch on your 5th wheel will not be a class I. The class I and class II receivers look identical just the Draw-Tite class I hitches have a weldstop integrated to keep you from using class II accessories that are rated higher. Yakima does not make a class I compatible bike rack so that will also ensure your hitch is a class II. It sounds like you want to use a hitch expander like # C45785 which you can do. Using an adapter like this will however reduce the tongue weight...
    view full answer...
  • 2 Inch Trailer Hitch Receiver Compatible With 1991 Volvo 240
    For your 1991 Volvo 240, there is only one hitch available and it is not a Class III. This is most likely due to the vehicle weight capacities given by the manufacturer that would limit the hitch capacity. I know you were specifically looking for that 2 inch receiver, but the Class II with the 1-1/4 inch receiver is all that is available as a fit. If you want a trailer hitch receiver on this vehicle, you will want the Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" # C12207...
    view full answer...
  • 2 inch Square Receiver Adapter for 1993 Buick Roadmaster
    All of the hitch receivers and receiver accessories that we offer are square, not rectangle. Since the receiver that you mentioned likely doesn't exist anymore, I recommended installing a new hitch so that you can use a variety of accessories. If you have the Sedan the recommend hitch is the Curt Class II # C12009. This trailer also has a Gross Trailer Weight of 3,500 lbs and a Gross Tongue Weight of 350 lbs. If your Roadmaster is an Estate Wagon then it would have taken the Curt C12041...
    view full answer...
  • Why Does a Hitch Expanded Reduce Weight Capacity But A Ball Mount Does Not
    The Curt Trailer Hitch Receiver Adapter part # C45785 will reduce the tongue weight capacity of your trailer hitch by 50% according to the manufacturer. This same statement holds true for pretty much any other hitch adapter like this no matter the manufacturer. The reason that this will reduce your tongue weight capacity by 50% but a ball mount will not has to do with a supported vs non-supported load. If you were to place a bike rack on the rear of the vehicle using a hitch adapter, the...
    view full answer...
  • Effects on Weight Capacity from Using Hitch Adapters
    Hitch adapters can be a convenient way to join accessories of different sizes, such as allowing use of a 2-inch hitch bike rack or towing ball mount in a smaller 1-1/4-inch hitch. An example of such an item is the Curt # C45785. The "dark side" of hitch adapters like these is that they also unavoidably reduce your hitch's capacity by 50-percent because they move the actual load that is on the hitch further away. This greater distance translates into more leverage applied to the hitch...
    view full answer...
  • How To Safely Carry Thule T2 Classic 4 Bike Rack With a 2020 Mazda CX-5
    I have another option, but using a 1-1/4 inch to 2 inch adapter like the Curt Trailer Hitch Receiver Adapter # C45785 will reduce the maximum tongue weight rating of your trailer hitch receiver by 50%. Due to the weight of your Thule T2 Classic 4 Bike you would not be able to support 4 bikes with an adapter. Your best option is to install the Curt Trailer Hitch Receiver # C13315 which has a 2x2 receiver, and installs with only the receiver being visible. I included a picture of Curt #...
    view full answer...
    Image 1 for
  • Can the Curt Adapter # C45785 be Used with the Class II Draw-Tite # 36554 on a 2016 Buick Encore
    You can use the Curt Trailer Hitch Receiver Adapter # C45785 with the Class II Draw-Tite Trailer Hitch Receiver # 36554 on your 2016 Buick Encore but the problem is that the adapter reduces the overall weight capacity of the trailer hitch by 50%. This means that this trailer hitch will be able to tow 1,750 lbs and has a tongue weight capacity of 150 lbs. The other thing to note is that you will experience more play in the receiver with the adapter. If you were to use the 24x60 Curt Cargo...
    view full answer...
  • 2 Inch Bike Rack On 1 1/4 Inch Hitch On 2001 Volvo V70
    For your 2001 Volvo V70 Wagon I suggest the Curt Class 2 Trailer Hitch Receiver Item # C12318. Although it is a 1-1/4" hitch, you will be able to use your 2" accessories and bike rack with the use of a hitch adapter. This hitch provides a tongue rating of 350 pounds. This rating is the amount of weight that will be loaded and forced downward onto the receiver. Currently for your vehicle there are not any options for a 2" hitch. There could be a couple of factors for this. The sizing of...
    view full answer...
  • Carrying a 2 Inch Bike Rack on a 2003 Subaru Outback
    The only trailer hitch receivers available for your 2003 Subaru Outback are 1-1/4 inch hitches. Between them I recommend the Curt part # C12270 if you don't already have a receiver. . To keep using your 1Up bike rack you can use a hitch expander like our part # C45785. This does decrease your hitch's capacity by 50 percent but since the hitch's tongue weight rating is 350 pounds you still likely have enough for a bike rack and some bikes. The other option is to replace your bike rack...
    view full answer...
  • Best Way to Convert Yakima HoldUp to 1-1/4 inch Hitch Size
    You can use hitch adapters like the # C45785 to carry a bike rack but you should note that doing so does cut the hitch capacity by 50 percent so it's not typically the best option. Your best option would definitely be the part # Y8890278 to convert your Yakima Holdup to the correct size for the hitch on your vehicle.
    view full answer...
  • Hitch Reciever and 2 Inch Adapter for Using a Kuat Bike Rack on a 2010 Toyota Corolla
    I recommend using a 1-1/4 inch to 2 inch adapter on your 2010 Toyota Corolla to use your Kuat bike rack . The Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long item # C45785 has a maximum tongue weight of 350 lbs which will be enough for your application but the adapter reduces your vehicles tongue weight by 50%. Depending on the type of Kuat bike rack you're using we do offer an adapter that allows you to utilizer your 1 1/4" hitch receiver without an adapter that...
    view full answer...
  • Best Option Hitch for 2008 Chevy Malibu LTZ
    I recommend the Curt Class II Receiver Hitch # C12051. This is a custom fit 1-1/14" hitch for your LTZ model 2008 Chevrolet Malibu. If you need a wiring harness I suggest # 46255. We have actually have video that covers your specific make/model and year vehicle; I have attached a link below. It is identified in this video that this hitch may set back slightly more than typical, and may require an extension for use with some accessories such as a bike rack. There are receiver adapters...
    view full answer...
  • Using 2 Inch Receiver For a Bike Rack Versus Using a 1-1/4 to 2 Inch Receiver Adapter
    The problem with using an adapter is that it will lower the tongue weight capacity of the hitch by 50%, and also, because there will be an intermediate piece installed in between the receiver hitch and the hitch mounted bike rack, you're going to have more bounce and movement in your bike rack. Additionally, if you're using hitch locks, you'll need a You would certainly save some money by going with the Curt Class II # C12091 hitch over the # 306-X7239 EcoHitch, but you'll need to purchase...
    view full answer...
  • Pin to Secure Curt 1-1/4" to 2" Trailer Hitch Receiver Adapter
    You can either use a standard Pin and Clip # PC2 or a Locking Hitch Pin # e98879 to secure the 1-1/4" end of the Curt Hitch Receiver Adapter # C45785.
    view full answer...
  • Anti-Rattle Option for Curt Hitch Adapter C45785
    While we do have an anti-rattle option for you, there isn't an anti-rattle hitch pin that will work with the Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" # C45785. The best option that will reduce the rattle with this adapter is the Roadmaster Quiet Hitch for 1-1/4" Trailer Hitches # RM-061-125. This will attach to your hitch and you'll tighten the U-bolt, which in turn will tighten the adapter to ensure a quieter, rattle-free ride. I have added a link below to a video...
    view full answer...
  • Could etrailer Anti-Rattle Hitch Lock be Used in Curt Hitch Adapter
    The etrailer threaded anti-rattle device part # e99047 can be used in the Curt hitch adapter part # C45785 only if you were to install an etrailer cargo carrier like # e98874 but it wouldn't be a standard lock/anti-rattle that could get used in all hitch accessories since it' threaded to fit the shank of the etrailer cargo carrier.
    view full answer...
  • Which 1-1/4 inch to 2 inch Hitch Adapter Can Fit Class I Hitches
    We have a 1-1/4 inch to 2 inch hitch adapter that is compatible with Class I 1-1/4 inch hitches like the part # HTAD or for a similar setup that provides additional rise you'd want the part # HT5R.
    view full answer...
  • Recommended Trailer Hitch Receiver For 2020 Toyota Camry To Carry Bike Rack
    I have a different option for you, but there is not a 2" trailer hitch receiver available for your 2020 Toyota Camry 2.5L Nightshade SE. Starting with the trailer hitch receiver I recommend the Draw-Tite Trailer Hitch Receiver - Custom Fit - Class II # 36643 which is the highest rated trailer hitch receiver available for your vehicle with a 350lb tongue weight rating and 3500lb trailer weight rating. Depending on the weight of your bike rack and bikes you may be able to use them by using...
    view full answer...
  • Trailer Hitch Fits for 2012 Lexus RX 350 for Use of Cargo Carrier
    The only size/class of trailer hitch offered for your 2012 Lexus RX 350 is the 2-inch Class III type like those shown on the linked page, such as Curt # C13143. I checked directly with both Draw-Tite and Curt and neither offers a 1-1/4-inch Class II hitch for your RX 350. You might refer to the linked article for help confirming your hitch size. There should also be a sticker on your hitch that indicates its class rating. Unless you had a custom-made hitch installed on your Lexus yours...
    view full answer...

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