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Curt Hitch Extender for 2" Hitch Receivers - 8" Long

Curt Hitch Extender for 2" Hitch Receivers - 8" Long

Item # C45791
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Extend your trailer hitch receiver opening so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer won't hit a rear-mounted propane tank when you make sharp turns. Powder coated steel resists rust. 1-800-496-5010 to order CURT hitch adapters part number C45791 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt Hitch Extender for 2" Hitch Receivers - 8" Long. Hitch Adapters reviews from real customers.
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  • Reviews (367)
  • Q & A (0)
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  • Why etrailer?

CURT Hitch Adapters - C45791

  • Hitch Extender
  • Fits 2 Inch Hitch
  • 8 In Extension
  • 3500 lbs
  • Bike Racks
  • Cargo Carriers
  • Hitch Mounted Accessories
  • Trailers
  • CURT

Extend your trailer hitch receiver opening so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer won't hit a rear-mounted propane tank when you make sharp turns. Powder coated steel resists rust.


  • Extends trailer hitch receiver opening out from the rear of your vehicle to avoid obstacles
    • Get extra clearance for your trailer
    • Mount your bike rack without having to remove your rear-mounted spare tire
  • Solid steel shank
  • Resists corrosion with black powder coat finish
  • Requires hitch pin and clip or hitch lock (sold separately)


  • Application: 2" x 2" trailer hitch receivers
  • Hitch receiver size: 2" x 2"
  • Maximum gross trailer weight: 3,500 lbs
  • Maximum tongue weight: 350 lbs
  • Overall length: 12"
  • Distance from center of hitch pin hole to center of hitch pin hole: 8"
  • Distance from the center of the hitch pin hole to the end of the shank: 2"
  • Distance from the center of the hitch pin hole to the weld of the receiver tube: 3"
  • 1-Year limited warranty


Note: Using a hitch extender will reduce your hitch's overall capacity by 50 percent.

45791 Curt Hitch Extender for 2" Trailer Hitch Receivers - 8 "

Customer Reviews

Curt Hitch Extender for 2" Hitch Receivers - 8" Long - C45791

Average Customer Rating:  4.8 out of 5 stars   (367 Customer Reviews)

Extend your trailer hitch receiver opening so that you can clear your spare tire when using your hitch-mounted bike rack or so that your trailer won't hit a rear-mounted propane tank when you make sharp turns. Powder coated steel resists rust.


top quality, does rattle if no clamp installed which I got here also. I needed this as our bike would hit the back of the RV with out it.


I'm sure the product was good as etrailer is always excellent. But when we got back two of the pieces were in the box but the curt hitch extender was not. The box had a hole in it and was tapped over. Who knows what happened.

Thank you for letting us know. I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 08/13/2022


super fast shipping and worked perfect as described this was for my personal lowered c-10 1970 step side I wanted my hitch hidden behind the lic plate and was having some clearance issues with the plate as it had to flip up not down to clear my hitch We use the m a,lot at work for hitches trailer parts ect with supply chain issues they take the time to call you and offer other solutions if not in stock for your on online orders excellent customer service


Perfect extension for the bike rack on the back of my Jeep! Quality product! Good company to work with!


Very heavy duty and works superbly with the tonge stabilizer. Worth the money over less expensive products!


A heavy duty hitch extension that fit perfectly in the factory installed receiver. Now I will be able to open the tailgate on my Subaru Outback without removing the bikes.


Works well, allows for oversized spare tire on the back of the Jeep to clear the teardrop trailer tongue jack.

*** Packaging was horrible. Placed in a cardboard box w/ no packing material, box was destroyed on arrival, and damaged / chipped paint. If you are going to charge us for shipping at least package the product so it will not be destroyed in normal shipping ***

Thank you for your review and I apologize about the shipping damage. Customer Service will be reaching out to you.
-- Etrailer Expert Sierra K - 08/19/2021


This hitch extender seems to be really good quality. Compared to a longer extender I bought from Harbor Freight, this one is much heavier. Shipping was a bit of a nightmare, but the etrailer team was awesome to work with to get everything squared away.


The shaft length of a standard insert for a receiver hitch was too short to allow towing a 96 gallon trash can because the trash can lid was wedged against the tailgate of the ATV. The hitch extender has added sufficient length that the lid hinge can be dropped onto the trailer ball without being wedged against the tailgate.

Still working as intended with no downtime or difficulties.. also useful as an easy tiedown point when transporting the atv on a flatbed trailer.
David - 11/24/2018


Received the 8” extension and it does exactly what I needed it to do. Matches up nicely with the Curt hitch on my SUV. Now I need not worry about how closely my trailers come to the rear end. Fast delivery and great support.


This extender is solid. Had to exchange for a drop down version to clear my rear hatch on Jeep Wrangler JL.


The hitch extension is heavy duty and I’m extremely happy with the quality. Service was superb and received the product in 2 days. Happy, happy, happy. Before and after photos are included.

I just wanted to provide you with a heads-up that using an extender like the # C45791 will reduce the capacity of your receiver hitch by 50 percent, as mentioned on the product page.
-- Etrailer Expert Mike L - 04/06/2018


Great. Extended my hitch just enough to keep my truck bumper from hitting my v-nose trailer. It greatly reduces the weight ratio, but length works out great.

Actually I bought a superduty and took extender out. Went with new B&W hitch on new truck. But the extender worked great on the f150
David L - 01/27/2021


I got this for my side by side as the receiver was mounted too far underneath the unit to be practical. This adapter moved it out to just the right spot. I use my SxS to move my trailers around my property mostly, & it works great.


have ordered and used this device before. What is disgraceful is the respect shown toward products shipped from etrailer. While the two devices/parts I ordered probably could have through a war zone without any damage, the fact is IF they are beaten out of the box while in shipping is not right. Add some appropriate packing. Grade F on your packaging.


I purchased this extension to use with my front end Curt Class 3 receiver hitch. This setup was installed for use of my Warn Wench that is installed in a portable receiver cradle that I use on either the front or rear of my truck. I chose this extension because of the solid shank that made it stronger than most other I shopped. As all extensions reduce the hitch weight rating, this one provided the least amount of reduction. I am very happy with my purchase and it works as advertised.


Great product, excellent website, very user friendly (the "how to" videos were especially helpful in making sure the product I was ordering was the right one), highly responsive customer relations department. The hitch extender worked correctly the first time, and fits perfectly with my new Thule bike rack (see photos). I highly recommend eTrailer!


Put a receiver underneath my travel trailer and I needed to Ring the receiver out 8 inches from underneath the trailer and it fit perfect and it’s heavy duty And with the anti-rattle device I got from etrailer it works perfect.


Bought a new car, and the lift gate was larger than last model. Bam! Ran right into my bike rack. So I ordered this hitch extension, and viola, the bike rack is now about 6' further out from the lift gate, and everything works great. Bonus: I don't have to manipulate the bike handlebar to open the lift gate. Excellent quality, and tight fit. I used a bolt rather than a cotter pin to attach the bike rack, as I could crank it down a bit better to reduce sway and noise.


I have yet to use it because the trailer is winterized and in storage. I anticipate the extension will do the intended job.
etrailer was awesome in the customer service department since the box originally delivered was empty(no extension or anything else in the box). I called immediately and they reshipped the extension the same day. The effort on their part to make a customer happy was extraordinary!


OMG This Extender is SOLID!! Bought this Curt Hitch Extender because of past Curt items purchased that I could count on. Could have purchased a hitch extension cheaper but you get what you pay for.


My UTV’s hitch receiver is so far under the bed that it makes hooking up anything with a ball mount nearly impossible. Enter the Curt Hitch Extender, which provided a solid, heavy-duty extra bit of reach for my hitch. I paired it with the Curt Ball Mount for 2" ATV Hitches - 2" Ball and Clevis Bar (C44009) and I can hook up pretty much anything I need.


It’s hell for stout, to be sure. I dropped 1 star because of the powder coating being chipped during shipping


Works perfect for a family of 5! I also used the 8 inch extension so it would clear my 35x10.5 all terrain tire. Plenty of clearance and since the rack tilts down, it provides enough space to access the rear cargo area of my Wrangler. My family is happy that we made this purchase.


needed for a plow mount on my's PERFECT! fastest shipping ever!

Show More Reviews

See what our Experts say about this CURT Hitch Adapters

  • Which 8 inch Hitch Extender has Highest Tongue Weight Capacity
    The three brands you mentioned all do make 8 inch hitch extensions. The Curt is the winner in terms of capacity though as it has a 350 lb tongue weight rating. That part number is # C45791. You should note that the use of these cuts the capacity of the hitch they are installed in by 50 percent.
    view full answer...
  • 8 Inch Hitch Extender for 2 Inch Hitch Receivers Rated for 3,500 Pounds
    They aren't from Blue Ox but we do carry some 8 inch long hitch extenders for 2 inch hitch receivers. The Curt # C45791 is rated up to 3,500 pounds and measures 8 inches from hitch pin hole to hitch pin hole. The capcity of the extender is 3,500 pounds but keep in mind using a hitch extender will decrease your tongue weight capacity by 50 percent. I've linked a review video on the extender, plus the rest of the selection we carry that meets your specs as well.
    view full answer...
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  • Recommended Extra-Long Ball Mounts to Provide Better Clearance Between Truck and Trailer
    A hitch extender like Curt # C45791 which fits 2-inch hitches will give you the 8-inch of additional trailer-to-truck clearance you want but at the heavy cost of taking away half of your hitch's towing capacity. All hitch adapters/extenders have this unfortunate side-effect. This occurs due to the increased leverage on the hitch tube from the extension. A better solution is to use an extra-extra-long ball mount and no adapter. You can see such items on the linked page.
    view full answer...
  • Hitch Extender Recommendation for Towing Trailer with Truck Camper
    Instead of using a tongue extender for your trailer you could use a hitch extender like the part # C45791 to basically get the same effect. This is an 8 inch extender that would work well for you. You should note that using an adapter like this will cut the capacity of the hitch on your truck in half.
    view full answer...
  • Effect on Hitch Tongue Weight Capacity from Use of Hitch Extension
    You are correct that increasing the distance between the hitch receiver and the actual load on it will also increase the leverage applied to the hitch. And this DOES indeed reduce the hitch's rated capacity. Hitch extensions, even fairly short ones like the 8-inch Curt # C45791, will cost you HALF of the hitch's rated tongue weight capacity. The physics of using adapters is more complicated than just the increased distance. Use of an adapter also allows for more motion of the suspended...
    view full answer...
  • 8 inch Hitch Extender Recommendation for 2014 Toyota Tundra with 2-ATVs in Bed of Truck
    We have the part # C45791 which is an 8 inch hitch extender. It has the capacity for your trailer as it has a 3,500 lb capacity. You should note that the towing capacity of your hitch gets cut in half when using an extender like this. But since you have a towing capacity of 9,800 lbs that won't be a problem at all.
    view full answer...
  • Using a Hitch Extender for a Cargo Carrier on a 2015 Roadtrek
    Technically speaking, a hitch extender like the Curt part # C45791 will fit. However, using an extender lowers your hitche's tongue weight by 50 percent so you will be limited on how much weight you carry. In addition to this, accessories on the back of an RV experience a lot more movement and therefore stress than normal. So not only will your weight capacity be lowered but you're also are going to experience a lot of movement on the hitch. So I don't recommend using an extender for...
    view full answer...
  • Recommendation For Hitch Extender To Carry Thule Apex Bike Rack With 2018 Jeep Rubicon JL
    Before I can recommend a hitch extension, I need to find out the actual extension needed. You will need to measure from the hitch pin hole to the rear edge of your spare tire to see how much length is needed for clearance of your 2018 Jeep JL Wrangler Unlimited. You will then need to determine the clearance needed by your bike rack by measuring the distance from center of hitch pin hole to the closest part of the bike rack. The difference is the extension size that you need (see article)....
    view full answer...
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  • Does the Curt Hitch Extender Part # C45791 Reduce Gross Trailer Weight
    The Curt Hitch Extender part # C45791 will only reduce the tongue weight (TW) capacity of the vehicle's hitch, not the gross trailer weight (GTW). The tongue weight capacity will be reduced to 350 lbs or 50% of the vehicle's tongue weight, whichever is lower. I have attached a review video of this hitch extender for you as well.
    view full answer...
  • Can Hitch Extender Be Used with Small Trailer Towing Lawn Equipment
    The deal with hitch extenders is that they cut the capacity of the hitch they are installed in by 50 percent due to the added length and leverage. If your tow vehicle has twice the towing capacity as what your trailer will weigh this adapter part # C45791 would work well. This adapter by itself has a capacity of 3,500 lbs so the adapter would easily work on a 2,500-3,000 lb trailer.
    view full answer...
  • What is Weight Capacity of Curt Hitch Extender # C45791
    The tongue weight capacity of the Curt hitch is 350 lbs which the other thing to consider is that it cuts the capacity of the hitch it's used in by 50 percent.
    view full answer...
  • Using a Hitch Extender When Towing Small John Boat
    So here's the deal with hitch extenders. Using an extender like the # C45791 will lower the hitch tongue weight capacity (maximum allowable weight bearing down on the hitch) by half, because the extender moves the load rearward by 8 inches which increases the leverage placed on the hitch and its attachment points to the vehicle. Your hitch will have an ID sticker on it that will list its tongue weight capacity. Divide that by 2, and you'll have the tongue weight capacity not to exceed when...
    view full answer...
  • Measurement From Center Pin Hole to Shank of Curt Hitch Extender C45791
    I believe I know the measurement you are referring to, which is just from the center of the pin hole of the extension back to the weld where the shank portion begins of the Curt Hitch Extender for 2" Hitch Receivers # C45791. That measurement, from pin hole to shank, is 5 inches. I have added links to video reviews for you to check out as well of this extender.
    view full answer...
    Image 1 for Image 2 for
  • Will the Thule T2 Clear the Rear Spare Tire On a Jeep
    You will need a hitch extender like the Curt Hitch Extender part # C45791 in order to clear the rear spare tire on a Jeep with most bike racks like the Thule T2 Bike Rack. There are a few hanging style racks that will clear as is but that's pretty much it.
    view full answer...
  • 8 Inch Hitch Extender For 2 Inch Hitch That With Less Than 4-1/2 Inches of Depth
    We do have an 8 inch hitch extender for a 2 inch hitch that has less than 4-1/2 inches of depth from the center of the hitch pin hole rearward, from Curt: - Curt Hitch Extender for 2" Hitch Receivers - 8" Long # C45791 This extender measures just 2 inches from the center of its rear hitch pin hole to the back of the extender, so it will allow you to have the needed 4-1/2 inches of clearance. I have added a link below to a video review for you to check out as well if you'd like to take a look.
    view full answer...
  • Front Mount Trailer Hitch Receiver for a 2003 Chevy Avalanche
    First, regarding the installation instructions, the front receiver # 31302 does fit other Chevy models other than the Silverado. I don't know why they didn't put that in the instructions but it might be to save space since this receiver fits Sierra, Silverado, Yukon, Avalanche, Tahoe, Suburban, and Escalade models. That is also why you see a video installation on a 2003 Tahoe which I have linked for reference. Regarding the use of an extension I do not recommend it. The use of an extension...
    view full answer...
  • Hitch Extender Recommendation for Jeep Wrangler to Allow Install of Bike Rack to Clear Spare
    For an 8 inch long hitch extender that should work perfectly for your 2014 Jeep Wrangler to allow your Yakima bike rack to install you would want the Curt part # C45791. I attached a review video that shows this product being installed on a similar Wrangler as yours too. For an anti-rattle lock for the extender you would also want the part # 63232. You should note that the use of a hitch extender cuts the capacity of the hitch in half due to the added leverage so you will need to keep...
    view full answer...
  • Can an 8 Inch Trailer Hitch Extension be Used to Tow a 1,700 Pound Camper
    Curt hitch extender # C45791 has a 350 pound tongue weight capacity and 3,500 gross trailer weight capacity. But the use of a hitch extender reduces the tongue weight capacity of a trailer hitch by 50 percent. As long as the reduced tongue weight capacity is greater than the 200 pound tongue weight of your camper then it will work. Another option is to use a longer ball mount such as # 80232. This ball mount measures 16 inches from the center of the hitch pin hole to the center of the...
    view full answer...
  • Which Hitch Extender will Give a Jeep Wrangler Additional Clearance to Install Bike Rack
    Most commonly with Jeep Wrangler the hitch extender part # C45791 does the trick as it adds 8 additional inches to the hitch tube. But that will depend on the bike rack you have and how much clearance your setup calls for. You should note that hitch extenders do cut the capacity of the hitch they are installed on in half. I attached a review video that shows the extender being used on a Wrangler just like yours.
    view full answer...
  • Will Hitch Extender Help with Turning Clearance of 31 Foot Eclipse Toy Hauler
    So a hitch extender could work for you but you have to keep in mind that using one cuts the hitch capacity by 50 percent which might be fine or might not depending on your trailer weight and the capacity of your tow vehicle due to the added movement and leverage that the extension creates. If you only need a few more inches a better solution would be a longer ball mount like the Hidden Hitch part # 80232 which is 15-3/4 inches in length from pin hole to ball hole, has a 6,000 lb towing...
    view full answer...
  • Are There 8 Inch Hitch Extenders for 2 Inch Hitches in Stainless Steel
    There are a pair of 8 inch hitch extenders for 2 inch trailer hitches, but these are solid steel with a black powder coat finish: - Curt Hitch Extender for 2" Hitch Receivers - 8" Long # C45791 - Hitch Extender for 2" Trailer Hitches - 8" Long # 80307 We do not do any type of fabrication or customization; every product we sell is made by other manufacturers. I have added links to video reviews for you to check out as well.
    view full answer...
  • Why Don't Ball Mounts with Longer Shanks Reduce Towing Capacity
    When looking at the weight capacities on ball mounts that feature a longer shank, such as the Curt Class I Drawbar # C45024 that you recently purchased, you can comfortably follow its listed weight rating without having to reduce the capacity based on its length beyond the hitch receiver. I definitely understand your concern with this type of design, as the further out from the vehicle you get, the more leverage any tongue weight will be putting on the trailer hitch. This is definitely...
    view full answer...
  • Recommendation to Extend Trailer Hitch for Towing Pop Up Camper with 2013 Ford F-150
    The best option for clearing the open tailgate on your Ford F-150 when towing a trailer is with an extended ball mount like the Curt # C45270. This ball mount measures 13 inches from the center of the hitch pin hole to the ball hole and has a gross towing weight capacity of 7,500 pounds. This ball mount also has either a 2 inch rise or 4 inch drop, so you will want to make sure that is appropriate for towing your trailer level. I have included a short video review on this product for...
    view full answer...
  • Curt Hitch Extension for Application that Needs 6 inches
    The Curt extender part # C45796 actually provides 18 inches of extension. The part # C45791 might be a better choice as it provides 8 inches of extension.
    view full answer...

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