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

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

Part Number: C45770
In Stock
$31.32
Retail:$54.96
You Save: 43%
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Transform your 2" trailer hitch receiver (Class III only) into a 1-1/4" one with this adapter from Curt. It slides into your existing hitch receiver so you can easily carry a 1-1/4" bike rack or other hitch-mounted accessory. 1-800-940-8924 to order CURT hitch adapters part number C45770 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Trailer Hitch Receiver Adapter - 2" (Class III) to 1-1/4" - 4" Long. Hitch Adapters reviews from real customers.
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  • Reviews (251)
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CURT Hitch Adapters - C45770

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

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


Features:

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


Specs:

  • Application: 2" x 2" trailer hitch receivers
    • Fits Class III hitches only
  • Receiver size: 1-1/4" x 1-1/4"
  • Maximum tongue weight: 350 lbs
  • Length: 4" from center of hitch pin hole to center of hitch pin hole
  • 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.



45770 Curt Hitch Extender for 2" Trailer Hitch Receivers - 4" Long




California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

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

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See what our Experts say about this CURT Hitch Adapters

  • Availability of Class II Hitch for 2021 Chevrolet Bolt EV
    The only option for a Class II hitch on your 2021 Chevy Bolt EV is the EcoHitch # 306-X7359 with a 2" receiver. Any hitch with a 1-1/4" receiver like the # 24956 is Class I. If your bike rack is Class I compatible the Draw-Tite will be the better option. More than likely it requires at least Class II if it has the capacity for two e-bikes. You can use an adapter like # C45770 with the EcoHitch but it will reduce your capacity by 50% so that isn't a good option. You may be faced with getting...
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  • Hitch Reducer for 2024 Hyundai Ioniq 5 to Use Thule Bike Rack
    Hey Julie, since all of the hitches that fit your 2024 Hyundai Ioniq 5 are 2 inch in size like the Curt # C98DR what you would need is a hitch reducer to allow bike rack to be used like the Curt # C45770 and you'd be set. Normally the 2 inch hitch size is preferred since it has higher capacities and has the most accessories made for it which is why it's so popular.
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  • How Can I Use a 1-1/4" Accessory on a 2-Inch Hitch for My 2022 BMW X3?
    By saying you have a 2022 BMW X3i, I assume you mean either a 2022 BMW X3 xDrive30i or the sDrive30i. You are correct that we only have 2-inch hitch receivers that are available for all models of 2022 X3. Although, there is a way to still use your 1-1/4" Class II accessory. For that route, I recommend using the Curt Trailer Hitch Receiver Adapter - 2" (Class III) to 1-1/4" - 4" Long # C45770 along with the Curt Hitch - 2" # C13387. With the adapter, you create a compatible 1-1/4" receiver...
    view full answer...
  • How To Use 1-1/4" Bike Rack With Curt Hitch On 2026 Kia Sportage X-Line Hybrid
    Hey Jack! Class III hitches with a 2" receiver like the Curt # C94WR are the only option for your 2026 Kia Sportage X-Line Hybrid. No need to worry though, you can still use your Allen Sports 532QR Deluxe bike rack with this hitch. All you need is the Curt Trailer Hitch Receiver Adapter - 2" (Class III) to 1-1/4" # C45770. The use of an adapter will cut the hitch capacity by 50%, but with standard bikes that won't be an issue. The hitch already has a high tongue weight capacity at 525...
    view full answer...
  • Using Yakima HoldUp EVO for 1-1/4” Hitches on a 2” Hitch Receiver
    I definitely have some options so that you can use your Yakima Hold-Up EVO Bike rack # Y02480, but the reason Yakima does not recommend using an adapter with this bike rack is because most hitch adapters reduce the weight capacity of your hitch by half. An example of that is this Curt Hitch Adapter # C45770 that not only makes your hitch smaller to fit 1-1/4" accessories, but it also extends out by 4" if you need extra length for clearance issues. The drawback is your weight capacity is...
    view full answer...
  • Recommended 2 Inch Hitch Adapter for Yakima DoubleDown
    The Replacement 2" Hitch Adapter Sleeve for Yakima TwoTimer Bike Rack # 8880519 is only compatible with the TwoTimer. Yakima did make a replacement 2" adapter for the DoubleDown, but it has been discontinued. Although this will not work for your bike rack I do have a solution. The best way to use your 1-1/4" accessories on your 2" hitch is with a hitch reducer like the Curt Trailer Hitch Receiver Adapter - 2" (Class III) to 1-1/4" - 4" Long # C45770. Keep in mind, the use of this adapter...
    view full answer...
  • How To Reduce Rattle When Using a 2 Inch to 1-1/4 Inch Reducer with Bike Rack
    I do have an option for you but all of the reducer sleeves like the Curt Trailer Hitch Receiver Adapter part # C45770 are going to be problematic in regards to excess slop at the connection point. However, what you can do to avoid this is use an anti-rattle device. The best anti-rattle devices we have are the Roadmaster Anti-Rattle devices which can be used for both the hitch reducer, and your 1-1/4" accessories. For the 2" side of the reducer you can use part # RM-061 and for the 1-1/4"...
    view full answer...
  • Parts Needed To Use Thule T2 Pro XTR 1-1/4" Bike Rack On Vehicle With 2" Receiver Hitch.
    The design of the Thule T2 Pro XTR Bike Rack # TH23JV you have is only for a 1-1/4" receiver so you must use an Extender/Reducer # C45770 when installing on a vehicle with a 2" receiver. You can replace the Lower Assembly # TH37MY which will convert your current bike rack to fit the 2" receiver without an adapter. This will effectively give you the Thule # TH83JV bike rack. As that is a very expensive part you might consider switching to a bike rack like the Kuat Transfer V2 # KU74FR. The...
    view full answer...
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  • Does the Yakima Hold-Up 2 and Yakima Two-Timer use the same tongue assembly?
    Unfortunately the tongue of your Yakima Two-Timer is different from your Yakima Hold-Up 2, so they cannot be interchanged. I have included pictures below that show the difference. Your best option is two get the Yakima HoldUp EVO bike rack, part # Y02480. It is an 1 1/4" bike rack that can hold all sized bike tires. Then you would get a the Curt Trailer Hitch Receiver Adapter, part # C45770, This will reduce your 2" hitch receiver to an 1 1/4". It will allow you to put your rack on each...
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    Image 1 for Image 2 for
  • How To Use Thule T2 Classic For 1-1/4 Receiver TH9045 In 2 Trailer Hitch Receiver
    I have another option for you, but you are correct that the Thule Shank # 853-7292 you purchased does not fit your Thule T2 Classic Bike Rack with a 1-1/4" Shank. There is not a replacement shank available to convert your rack to work with the 2" version. Instead you will need the Curt Trailer Hitch Receiver Adapter # C45770 so you can use the anti-rattle hitch lock included with your bike rack, and then use the # 63232 to secure the adapter to your trailer hitch receiver. Keep in mind...
    view full answer...
  • What Hitch Adapter Allows Me to Use the 1-1/4 Inch Yakima Dr. Tray on a 2-Inch Hitch?
    I have a solution for you. If you are trying to use your 1-1/4" Yakima Dr. Tray with on a 2-inch hitch receiver, the 2" Shank Adapter for Yakima Ridgeback or FullTilt Bike Rack 8890298 unfortunately will not fit. This is because this adapter is specifically made for Rideback and Fulltilt racks manufactured before November 2015. Also, I am sorry to say that Yakima does not carry a similar 2-inch adapter for the Dr. Tray. With that being said, there is still a way to use the Dr. Tray on...
    view full answer...
  • Anti-Rattle Device for 2 Inch to 1-1/4 Inch Receiver Adapter Carrying Bike Rack
    Because using an adapter like the # C45770 adds another piece to the connection between the hitch receiver tube and the hitch mounted accessory (bike rack in this instance), you will tend to get some more movement than you normally would. If you were to use a Roadmaster Quiet Hitch, part # RM-061 where the adapter connects to the receiver hitch, it would prevent movement there. If your bike rack already has an anti-rattle threaded hitch pin, you won't need to do anything about the connection...
    view full answer...
  • Recommended Trailer Hitch For A 2023 Kia Sportage
    Though we have class 3 hitches available for your 2023 Kia Sportage, we do not have any class one hitches. I recommend the etrailer Trailer Hitch Receiver # e38KR. After installation it will give your vehicle a clean off the factory look with only the two inch receiver head showing. It has a bolt-on installation with no welding required. If you're needing to reduce the 2 inch receiver to a 1-1/4 inch receiver you can do that by using the Curt Trailer Hitch Receiver Adapter # C45770. Using...
    view full answer...
  • What 2" to 1-1/4" Hitch Adapter do You Recommend for Use on My 2021 Ford F-350?
    For a hitch adapter, the only adapters we have for a 2-inch hitch is to convert it to a 1-1/4" opening. If this is the adapter you need, I recommend the Curt Trailer Hitch Receiver Adapter - 2" (Class III) to 1-1/4" - 4" Long # C45770. This is the shortest adapter we carry for 2" to 1-1/4". It is important to note that this adapter only works with Class III 2 inch receivers. We do have a slightly longer adapter that works for all class sizes of 2 inch hitches. That is the Hitch Adapter...
    view full answer...
  • Recommended Adapter for Installing 1-1/4 Inch Hitch Accessories in 2 Inch Hitch
    Anytime a hitch accessory is left in a receiver for an extended period of time, you'll run the risk of the hitch and the shank of the accessory or the adapter corroding over time and becoming rusted together, which is why we don't typically recommend leaving hitch mounted accessories installed in the receiver when they're not being used. Applying some grease to the shank of the hitch accessory and the shank of the adapter will go a long way toward preventing this from occurring, but I'd...
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  • Trailer Hitch for 2020 Ford Escape Hybrid
    I am happy to help you find a hitch for your 2020 Ford Escape Hybrid. I contacted Draw-Tite to discuss the # DT92RR hitch, and they are currently researching its compatibility with the Hybrid model after discovering issues with fitment near the exhaust. I recommend you go with the Curt # C23FR hitch. It is a confirmed fit for the Hybrid and there are some helpful customer reviews showing it installs and works well on your vehicle. The Curt hitch is a 2 inch instead of a 1-1/4 which will...
    view full answer...
  • Recommended Trailer Hitch Adapter Compatible with Thule T2 9045 Bike Rack and 2 Inch Receiver
    For your Thule T2 Classic 2 Bike Platform Rack - 1-1/4" Hitches # TH9045 there is not a an adapter compatible for a 2 inch hitch from Thule and they also don't have the replaceable shank to upgrade to the 2 inch receiver. The best adapter to fit your truck is the Curt Trailer Hitch Receiver Adapter - 2" to 1-1/4" - 4" Long # C45770. This will allow you to use the hitch lock that came with your bike rack and then you will use a separate hitch lock like # 63232 to secure and lock the...
    view full answer...
  • Using an Adapter on a 2 Hitch for a 1-1/4 Boone Outdoor Tailgate Table on a 2018 Ford Edge
    You can indeed use a hitch adapter to pair a 1-1/4" accessory like the Boone Outdoor Tailgate Table, part # BH70114, with a 2" receiver. Using an adapter reduces your tongue weight by 50%, so remember that if you plan on towing heavier accessories with a 1-1/4" shank. If you are worried about sway, then you need an adapter that has a shorter shank. I recommend the Curt Adapter, part # C45770. It only has 4" between the center of one hitch pin hole to the other. I've linked to a video review...
    view full answer...
  • Curt RockerBall Shock Absorbing 2" Ball For 800LB Trailer Pulled by 2010 Subaru Forester 2" Receiver
    I have a recommendation as the 3,500lb Curt RockerBall # C94CR is only designed to be used with 1-1/4" Class I and II ball mounts. Since you already have 2" draw bars/ball mounts you can use the 7,500lb Curt RockerBall # C40047. This will fit your 2-1/2" wide mounts. This will work with your trailer even though it is only 800lbs. Do not be overly concerned with the weight ratings as these are maximum weight ratings and the reason the other RockerBall is so low at 3,500lbs is the 3/4"...
    view full answer...
  • Hitch Adapters To Carry a Thule T2 Pro XTR Bike Rack With 1-1/4" and 2-1/2" Vehicle Receivers
    The Thule T2 Pro XTR Bike Rack # TH23JV will work directly with your 2012 Toyota Prius. This is the one you will need to use since your Prius has a class 1 receiver. For using the same rack with your Silverado 2500HD that has the 2-1/2" receiver you will need 2 adapters. I recommend the B&W Hitch Receiver Reducer Sleeve # BWRHXA2182 that will slide into the receiver and make the receiver tube 2". You will then use the Curt Trailer Hitch Receiver Adapter # C45770 to bring it down to the...
    view full answer...
  • Trailer Hitch Receiver For 2022 Toyota Sienna For Bike Rack
    There are indeed only 2 inch trailer hitch receivers that fit your 2022 Toyota Sienna, though if your bike rack only fits a 1-1/4 inch hitch, you can use a hitch adapter and reducer. First, for the hitch, by far the best option for a bike rack for your '22 Sienna is the following: - etrailer Trailer Hitch Receiver # e56RR Not only does the # e56RR have the best bumper clearance, but it also has a matte black finish which hides the inevitable dings and scratches better than glossier finishes....
    view full answer...
  • Recommended Hitch for 2021 Volkswagen Tiguan SE With No Holes or Bolts in Side Frame
    Your 2021 Tiguan SE should have holes in the side frame, it is the weldnuts that have been reported missing on some models. I recommend completely avoiding this with the Stealth Hitches Hidden Rack Receiver - Custom Fit - 2" # SH49ZR. This custom fit hitch uses a different installation process so the lack of weldnuts will not be an issue. The Stealth Hitch replaces the factory reinforcement beam on the back of your vehicle. The hitch has a tongue weight of 350 lbs and is only for hitch...
    view full answer...
  • Thule T2 Bike Carrier Replacement Shank
    If you have a 2 inch hitch on your 2020 Mazda CX-9 and use a hitch reducer # C45770 then this shank # 753370902 for the Thule T2 will work!
    view full answer...
  • Two E-Bike Rack With Ramp For Class III Hitch - 2019 Ford Escape
    Thank you for your feedback! I've got a solution for you. While we offer quite a few hitch racks that are compatible with your e-bikes, it sounds like a ramp is pretty important to you, which narrows the field a bit. While I don't have the complete specs of your trailer hitch, it's likely that you have a Class III hitch installed on your 2019 Ford Escape with a 2" receiver, with a tongue weight capacity of at least 300 lbs. The Yakima # Y36FR bike rack comes with that ramp you're looking...
    view full answer...


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Installed by:
Kathleen M
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
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Employee Kristina F
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