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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

Item # C45785
Our Price: $59.79
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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. 1-800-940-8924 to order CURT hitch adapters part number C45785 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long. Hitch Adapters reviews from real customers.
  • All Info
  • Reviews (99)
  • Q & A (0)
  • Photos

CURT Hitch Adapters - C45785

  • Hitch Expander
  • Fits 1-1/4 Inch Hitch
  • 6 Inch 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

Customer Satisfaction Score:

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   (99 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.


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.

Etrailer Expert

Sierra K.


Thanks for the feedback. Looks like you need one a tad bit bigger like item # HTAD.


Great product from an even greater company. ETRAILER has the knowledge and products to solve most any trailering problem.


Solid heavy duty steel. Fits snugly into hitch.



Works great. Easy to attach and remove. Secure mount.


First time ever to buy this set up. The very first time in my life and wrong hitch receiver.

Etrailer Expert

Jenny N.


Oh no! I will have our Customer Service team reach out to you.


It did what I'm supposed to do and you can't ask for anything more than that


Very quick delivery and such a quality product.


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


Works Fantastic

William Y.


Working fine


Needed the adaptor for a bike rack and works great but with a few issues. It is does add several inches so need to be careful backing up, in parking spaces, and can bottom out (our driveway has a dip). Same bike rack on newer car did not need an adaptor and avoids these issues.




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.

Etrailer Expert

Mike L.


Please be aware that using the adapter/extender will reduce the tongue weight capacity of your hitch by half.


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.

Etrailer Expert

Heather A.


It sounds like you need a 2 hitch pin for the 2 portion of this adapter. For that I recommend locking pin part # e98880 to help protect your setup. If you needed a pin for the 1-14 side of the adapter I recommend part # e98879. You can also get these keyed alike.


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.


Nice quality.


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.


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.


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.


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!!!


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.


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.


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.


We wanted the latest part to adapt our new hitch to be able to accept a Thule bike rack. The new part is perfect.


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.


This wasn't deep enough to fit my bike rack, but a few minutes later with the saw I was in business. Would likely be perfect for m9st applications.


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.

Show More Reviews

See what our Experts say 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...
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  • Hitch-Mount Trike Carrier for 1-1/4-Inch Class II Hitch
    I understand your predicament, having a hitch and hitch bike rack that will not work together. Smaller vehicles typically accept smaller hitches, and for your 2018 Ford EcoSport compact SUV only 1-1/4-inch Class II hitches are offered since the car itself cannot handle the load that a 2-inch Class III hitch typically can. We offer 1-1/4-inch Draw-Tite # 36660 and Curt # C12188 hitches both of which are rated for 350-lbs of tongue weight. Hitch adapters like # HTAD, # HT5R, and # C45785...
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  • 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.
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  • 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.
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  • 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.
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  • 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.
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  • 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...
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  • 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...
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  • How To Carry Four Bikes on a 2016 Lincoln MKZ
    There is a possibility that you can use your Reese Q-Slot PS63138 with the Curt Trailer Hitch Receiver part # C12091 on your 2016 Lincoln MKZ. However, the adapter you need, Curt Trailer Hitch Receiver Adapter part # C45785 will reduce you weight capacity by 50%. Therefore, the total weight of your four bikes cannot exceed 109 lbs. If they do not then you can use the Reese Q-Slot but you will also need the Curt Cam Buckle Stabilizing Strap part # 18050 to abide by Curt's warranty for the...
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  • Availability of Adapter to Allow Bike Rack to Be Carried and Tow Trailer
    Sounds like you may be interested in the part # D210. This will fit your 2 inch hitch and gives you a ball mount platform down below and a hitch opening above for your bike rack. However, if you do not yet have a hitch yet, we have great news. We have the EcoHitch Hidden Trailer Hitch Receiver # 306-X7322 that has a 2" opening and a 300-pound tongue weight capacity. With this hitch, you could use the Thule Hitching Post Pro 4-bike rack # TH934XTR. I attached a video of these products...
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  • 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...
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  • 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...
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  • Recommended Trailer Hitch Receiver and Towing Components for 2017 Honda Accord Sedan
    The Curt Trailer Hitch Receiver - Custom Fit - Class I # C11681 is a confirmed fit for your 2017 Honda Accord Sedan and at this time there is not a Class II hitch available. If you will be towing with this hitch, I recommend the ball mount # C45521 and hitch ball # A-80 for a 1-7/8 inch ball or # A-82 for a 2 inch diameter hitch ball. You will also need a pin and clip like # F-4 to secure your ball mount. For trailer wiring, I recommend the Curt T-Connector # C56299 which will connect...
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  • 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.
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  • 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...
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  • Do They Make a 2 Inch Trailer Hitch for a 2005 Volvo S80
    The only trailer hitch receiver they offer for your 2005 Volvo S80 is the Curt Trailer Hitch Receiver part # C12285 which has a 1-1/4" receiver tube opening. Therefore, no they do not offer a trailer hitch receiver with a 2" receiver tube opening on your 2005 Volvo S80. You can obtain a 2" receiver tube opening by using the Curt Trailer Hitch Receiver Adapter part # C45785 but please keep in mind that this will reduce the weight capacity of your trailer hitch by 50%. If you can tell me...
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  • 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...
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  • Will This Chevrolet - Brake and Tail Light Receiver Cover # CR-007C fit 1-1/4 inch Hitches
    I spoke with my contact at Pilot and he said that this Chevrolet - Brake and Tail Light Receiver Cover, part # CR-007C, will only fit 2 inch hitches, but I have a solution for you. You could use the Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6" Long # C45785 to connect your hitch cover, however, it will stick out 6 inches from the hitch pin hole.
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  • 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.
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  • 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...
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  • Recommended Trailer Hitch Adapter To Expand Hitch On 2015 Ford C-Max
    For the Yakima Rack and Roll Trailer - 66" # Y08106, you will only need a 2 inch ball that you already have with your Weigh Safe adjustable ball mount. The adapter for the trailer hitch on your 2015 Ford C-Max I recommend is the Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" - 6 Long # C45785. This will reduce your hitch receiver's tongue weight capacity by 50%. Based on the application, this should not be an issue, but this would not be wise for any larger application. To...
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  • Trailer Hitch Receiver For 2018 Buick Regal TourX Using 2 Bike Rack and Cargo Carrier
    The Curt Trailer Hitch Receiver # C12173 is only available with a 1-1/4" receiver tube on your 2018 Buick Regal TourX. You can use a Curt Trailer Hitch Receiver Adapter # C45785 to allow you to still use your 2" hitch mounted accessories. The adapter does reduce the receiver capacity by 50%, which would allow you to carry 175lbs with the Draw-Tite receiver. I recommend using a Roadmaster Quiet Hitch for 1-1/4" Trailer Hitches # RM-061-125 to remove the rattle in the adapter to the receiver...
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  • Hitch Adapter for Bike Rack on 2017 Volkswagen Golf
    The Curt Trailer Hitch Receiver Adapter # C45785 does have different measurements than an adapter that is compatible with a Class I hitch, the Brophy # HTAD, as well as different capacities. For example, the Curt adapter is 6" from center of hitch pin hole to center of hitch pin hole while the Brophy is 7-1/4". The Curt is also rated for a tongue weight of 350 lbs while the Brophy is rated for 300 lbs. So the solution for you would be to use the appropriately rated Brophy # HTAD with Curt...
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    Image 1 for
  • Does the Curt Hitch Adapter # C45785 Come with a Hitch Pin?
    The Curt Trailer Hitch Receiver Adapter - 1-1/4" (Class II) to 2" # C45785 does not come with a hitch pin. If you are in need of a hitch pin for the 1-1/4" end of the receiver, that is the # 5200. For the 2" receiver end, that is the # e98880. Both of these are locking pins in order to protect your adapter as well as your hitch-mounted accessories.
    view full answer...

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