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  1. Trailer Hitch Ball Mount
  2. CURT
  3. Fits 1-1/4 Inch Hitch
  4. Fixed Ball Mount
  5. Drop - 3 Inch
  6. Rise - 2 Inch
Curt Class II Drawbar - 2-5/8" Rise, 3-1/4" Drop - 7-1/4" Long - 3,500 lbs

Curt Class II Drawbar - 2-5/8" Rise, 3-1/4" Drop - 7-1/4" Long - 3,500 lbs

Item # C45521
Our Price: $52.04
You Save: 9%
Trailer Hitch Ball Mount
Shipping Weight: 5 lbs
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Corrosion-resistant ball mount is 7-1/4" long and fits 1-1/4" x 1-1/4" trailer hitch receivers. Great Prices for the best trailer hitch ball mount from CURT. Curt Class II Drawbar - 2-5/8" Rise, 3-1/4" Drop - 7-1/4" Long - 3,500 lbs part number C45521 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (1988)
  • Q & A (0)
  • Photos

CURT Trailer Hitch Ball Mount - C45521

  • Fits 1-1/4 Inch Hitch
  • Fixed Ball Mount
  • Drop - 3 Inch
  • Rise - 2 Inch
  • No Ball
  • 3500 lbs GTW
  • Class II
  • CURT
  • Steel Shank - Gloss Black
  • 3/4 Inch Ball Hole Diameter

Corrosion-resistant ball mount is 7-1/4" long and fits 1-1/4" x 1-1/4" trailer hitch receivers.


  • Sturdy, steel construction
  • Corrosion-resistant, black gloss powder coat finish
  • High-quality manufacturing process
    • CNC machined for strong, consistent cuts and welds
    • 7-Stage washing method delivers smooth, clean surface
  • Both drop and rise positions available to ensure level towing
  • Hitch pin and clip or hitch lock sold separately
  • Assembled in USA


  • Application: 1-1/4" x 1-1/4" trailer hitch receivers
    • Compatible with Curt Class I and Class II hitches
  • Gross towing weight: 3,500 lbs
  • Tongue weight: 350 lbs
  • Ball hole diameter: 3/4"
  • Length: 7-1/4" from center of hitch pin hole to center of ball hole
  • Rise: 2-5/8" from top of inside of hitch opening
  • Drop: 3-1/4" from top of inside of hitch opening

How to Measure Drop on Standard Ball Mount

D-21 45521 Curt Ball Mount - 1-1/4" - Class II

Customer Satisfaction Score:

Customer Reviews

Curt Class II Drawbar - 2-5/8" Rise, 3-1/4" Drop - 7-1/4" Long - 3,500 lbs - C45521

Average Customer Rating:  4.8 out of 5 stars   (1988 Customer Reviews)

Corrosion-resistant ball mount is 7-1/4" long and fits 1-1/4" x 1-1/4" trailer hitch receivers.


I installed this on my 2015 Honda Accord for the purpose of pulling my small aluminum fishing boat and trailer. Works great!


Drawbar looks great and will be using in next two days. Thanks!


Wonderful product. I had the hitch installed in 10 minutes. The wiring was a little more tricky because it required running a power wire all the way to the battery. I towed my trailer from Florida to Tennessee and back. Etrailer is still wonderful to deal with as they always have been in the past. My hitch came in a couple of days. I wouldn't think of ordering from any one else.


Simple. Does the job.



Simple. Reliable. Does the job.


It has performed well for several thousand miles of towing. I would like to see the tolerance between the bar and the hitch a little tighter. When towing you can hear the movement of the drawbar inside the receiver.


i placed an order through etrailer and received the first shipment on time as expected, though after trying to install the receiver I realized that it was for the 4 door version of my car instead of the coupe. I called them instantly and within 5 minutes of talking to their customer service i had a new receiver on the way to my door step. The customer service here is amazing and they do their best to take care of their customers. The new part was received and fit just as intended. it is high quality and looks amazing!!!! I would recommend them for any and all trailer needs.


I ordered a receiver for a 2014 Subaru Impreza, and a drawbar and hitch cover. The package arrived a bit beat up, but nothing was missing or damaged. I intend to use the receiver for a bicycle mount and the drawbar (with an eyebolt) as a rear tie-down for kayaks and probably won't really tow anything.
The online video on how to thread the carriage bolts and anti-spin washers was excellent as were the printed instructions. The fish wire (two different ones) was included and was 'threaded' or coiled to hold the threads of each bolt quite firmly. The stiffness of the wire was perfect.
I used a 'step drill' to enlarge the two front holes in the frame (these new frames aren't made with a real heavy gauge metal, btw) The step drill made a near-perfect round hole vs a Dremel type device that others have used, but either would be fine. Wear goggles to protect your eyes from flying metal shards, please, but don't be intimidated by the project! You will most likely need a helper; my wife threaded the nuts on the bolts while I held up the roughly 30 pound hitch. I also gooped the top of the hitch with black silicone caulk to waterproof the connection. I had no need for the spacers and the receiver was about a half inch from the bottom of the bumper and flush -to -slightly- in from the back of the car.
Etrailer does offer tracking now, so earlier criticisms--if valid then--have been acted upon. Delivery to Cleveland area from Mo. was two to three days. I just wish they offered a device for the front area of the vehicle for tie-down lines for the kayaks (hint, hint, but I have a plan for that).
Secure and satisfied.

Etrailer Expert

Patrick B.


We do have some tie downs for the front. Check out part # TH529 or part # TH530 from Thule. One set is bolt-on, the other set, you just close the hood on.


The product came as the order indicated it would be.

However, since the hitch is my son's and he will use it on an ATV trailer connection, it has not been tried out yet. I think it will be the solution that he has been looking for. The ATV and trailer are at the son's cabin (about 1.5 hr. drive) and will be another week or 10 days before we test out if the hitch will work. I will send feedback after that.



The hitch and ball mount have worked out great for me no issues.


It's a ball mount designed to fit Curt hitch 12284 - Subaru Crosstrek. Rise and extension with that hitch are correct. Only complaint are the paint chips and scratches when it arrived.


Couldn't tow with out this, though I am using it the opposite way of the photo. I would love to get one that has double or even triple the "raise" I get from this one, I still have to jack up the car with a hydraulic floor jack I carry with me, otherwise the trailer could not be put on the car.

Etrailer Expert

Heather A.


Thank you for your review. The ball mount that fits a one and a quarter inch hitch with the most rise available is part BR39FR with a five and a half inch rise. The Brophy ball mount is the same length as your current ball mount at seven and a quarter inches long. If you are looking for a ball mount that is less expensive, I recommend part C45014 which has a five inch rise and is 9 and five eighths inches long.


Just installed this, along with the receiver, ball and wiring harness. I'm new to trailering, but the website has a lot of helpful support and I had no difficulties. Good solid feel to this.

John H.


Still going strong. Great products and absolutely no complaints


This product was exactly as advertised! I have used it to pull a small trailer full of rafting gear, boat, frame, etc and pulled it several thousand miles from the Pacific NW to the Grand Canyon and back. I also use it to pull my small sailboat. Very durable!

Mike B.


No problems at all. Works as advertised!


Ordered a Curt trailer hitch receiver to mount on a 2003 Dodge Caravan to pull an old Scamp trailer. Came promptly, installed easily and works well.


I spent around $175 for a what I thought to be a complete hitch installation and apparently the lousy $2.00 receiver pin was too much cost for etrailer to include. So now I get the pleasure to travel 25 miles to buy that pin locally. Amazon looks better every day.

Etrailer Expert

Rachael H.


Our description states that the hitch pin and clip or locking hitch pin is sold separately. This is to allow our customers to choose the approiate lock that they may need, or mayalready have for their accessories. If you would like the standard hitch pin that would be used for this item is a F-4. Or a locking version as part C23517.


Worked perfectly with my standard Ford Explorer hitch 2003. Service at etrailer was great, and hitch arrived in timely manner.





This got installed on my wife's Forester and we have used it several times for pulling a utility trailer and also for pulling our dock and raft at our camp. Very happy with the options it offers for moving more than fits in the car. Since the Forester had the dual exhaust, i did cheat and have my mechanic do the install. He did it within the hour that is advertised, but did say it would have been a bit of a challenge working at ground level. I think I still ended up paying less in total than going to a hitch installer

overall, very happy with the hitch, wiring harness, and drawbar. It's especially nice to have the harness tucked away, as it doesn't get used that often.


etrailer is smart. They ask for a review a year later and not 10 minutes after you buy the product. That gives you a chance to install it and use it. This receiver has done as I expected. It was an easy install and works well. The only downside to date was me. I left the hitch attached to the car/receiver and a guy walked around my car, kind of close to it and tripped over the ball mount/draw bar. Ouch!!
Love etrailer and my hitch assembly.


Love it. Works great and just the right height for my 06 cobalt. No surprise its a awesome product like normal


Gentlemen & ladies,
I would like to
take a minute to let you know my thoughts on your service and your product. First, after looking at many, many websites I settled on yours as it offered SO much MORE than many of the others. In addition to the plethora of items, there were well written instructions with proper diagrams and illustrations in a pdf format for all the items offered.

Also included on their website were well produced instructional videos that even our cat could understand!! ;-) Shipping / delivery was free(as is for all orders over $99.00) and prompt! After receiving the items I had ordered (the Curt Trailer hitch receiver, cat.# C11265, Curt Class II drawbar, cat.#C45521, Curt T-connector wiring harness, cat.#55542 and the hitch ball, cat.#19258; I was able to quickly gather up the tools needed for installation as this information is thoughtfully included as well.

Installation was a breeze!! I have towed one trailer with this so far and plan on safely towing many more in the future. In addition to the ability to tow, the receiver I purchased will accommodate a bike rack and a cargo carrier, both made by the same company!!
I HIGHLY recommend for all your vehicle needs and more!!

Great job!!!!!

Terry Fulton
Milwaukee, Wisconsin.


I purchased both the trailer hitch for my 2007 Honda Element and the wiring harness. The products came shipped to me on time and packaged very well. Installation of the hitch was extremely easy. Only thing I would recommend is to use a drill bit file instead of a drill to enlarge the hole to mount the hitch because it doesn't really need to be enlarged that much more. The wiring harness was also extremely easy to install. I suggest using the videos on YouTube because those helped to make things a little clearer. I am extremely satisfied with the products and value that I received from this company. I would recommend it highly.


I am thrilled with the trailer ball & hitch I purchased from you one year ago for my Toyota Camry. I have used the hitch numerous times to rent U-Haul trailers rather than trucks (which you have a mileage fee on) and saved more than triple the cost of my purchase.

As the mom to a college aged daughter, I was the one to help her & her friends move out of the dorms, into their first shared apartment & delivered the gently used furniture we found online to furnish their first digs.

Most recently I helped them move to a furnished shared flat and was able to haul their furniture to both a consignment store & a donation center so that their finds can live on and make other families happy.

The products I purchased from still looks and perform like new. Thank you, Erica, for your professional advice and support. I highly recommend to everyone I meet!

A grateful Mom


I received what was ordered but it seems like it will be too low for a trailer. I called the company, and the lady was very professional. She verified that I had the correct part and sent info to me on measuring rise & drop for the hitch. I haven't purchased a trailer yet so I will re-order if needed.


Overall everything has worked as it should. My only complaint would be that I have pretty much always had some wobble/looseness of the drawbar in the receiver. It is actually audible when driving.

I was in the process of buying, and selling a house when I installed the trailer hitch, so the issue was overlooked due to the complexity of the move. I guess I learned to live with it, and hope it doesn't ever cause a failure.


Hitch arrived in a timely fashion. Installation was a breeze and the fit and finish were perfect. Wiring harness hooked up perfectly. etrailer made the whole process simple. I just ordered another hitch and harness for our new car.


I have never regretted ordering through etrailer. As always, this order arrived precisely on-time. The wiring for trailer lights proceeded exactly as expected. The online video describing the installation was very helpful with no surprises encountered while following the instruction. Don't forget to order a hitch pin. Surprisingly, it wasn't included with the drawbar.

Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball Mount

  • Will Curt Ball Mount C45521 Fit a 2014 Subaru Outback with Class I Trailer Hitch
    Ball mount # C45521 is compatible with Class I and II trailer hitches with 1-1/4 inch receivers. So it will fit the hitch. Usually though on Class I and II trailer hitches you have to use the ball mount indicated by the hitch manufacturer or it could void the hitch warranty. If the hitch is an OEM hitch then you will need to check with the dealer. The issue is that on Class I and II trailer hitches they test and rate the hitch using a specific ball mount. The use of a different ball mount...
    view full answer...
  • How to Pick Out a Ball Mount for a 2014 Subaru Forester to Tow Trailer Level
    When picking out a ball mount for a vehicle like your 2014 Subaru Forester you want to go with the ball mount that will allow the trailer to be towed as level as possible. To do this you will need to measure from the top of the hitch opening to the ground and then with the trailer as level as possible measure from the bottom of the coupler to the ground. The difference between these two measurements is the amount of rise/drop you will need. I attached a help article that covers how to...
    view full answer...
  • Distance from the Hitch Pin Hole to the Back of the Shank on the Curt Class II Drawbar
    I went out to our warehouse to measure the distance from the center of the hitch pin hole to the back of the shank on the Curt Class II Drawbar, # C45521, and it is 1-1/2 inches. I have attached a picture to illustrate my measurement.
    view full answer...
    Image 1 for
  • Availability of 1-1/4 Inch Ball Mount for 50mm Hitch Ball with 1 Inch Diameter Shank
    I do have a solution for you, however all of our available ball mounts for 1-1/4 inch receivers feature a ball hole diameter of 3/4 inches. I recommend simply going with a new 50mm hitch ball like the Draw-Tite # 63912, which features a 3/4 inch diameter shank. You can then pair the ball with any 1-1/4 inch ball mount we have available, such as the Curt Class II Drawbar # C45521. This ball mount has a towing capacity of 3,500 pounds and a rise of 2-5/8 inches or a drop of 3-1/4 inches....
    view full answer...
  • Will Curt Class I Hitch # C11367 Fit 2014 BMW 328d Sedan
    The Curt Class I Hitch # C11367 that you referenced does indeed fit the 2014 BMW 328d sedan as long as the vehicle has a single muffler. Installation will require temporary removal of the bumper and heat shield. This light-duty hitch will bolt on using included hardware and the only specialized tool needed is a torque wrench. If you intend to use a bike rack with it, please note that only 2 bikes can be carried on a Class I hitch. Please refer to the linked article on hitch classes. You...
    view full answer...
  • Class I and II Trailer Hitches and Accessories are 1-1/4 Inch
    Class II trailer hitches and accessories all have 1-1/4 inch receivers/shanks. Class III accessories and hitches are 2 inch. If you have a Class I or Class II trailer hitch then you are supposed to use the ball mount recommended by the trailer hitch manufacturer for warranty reasons. If you have a 2004 Scion xB then all of the hitches for it are Class I trailer hitches and you should be using ball mount # C45521. I have included some links on hitch classes and ball mounts for you.
    view full answer...
  • Is Ball Mount Included With Curt Hitch C11497 for a 2005 Subaru Impreza
    The Curt Trailer Hitch # C11497 does not come with a drawbar. It is designed for use with the ball mount # C45521.
    view full answer...
  • Hitch and Ball Mount Recommendation for a 2015 Honda Accord
    I spoke to my contact at Curt and he informed me that the Curt Hitch part # C11681 that you referenced has been confirmed to fit all models of the 2015 Honda Accord so it would work great on your 2015 Honda Accord Sedan Touring. The recommended ball mount with this kit is the part # C45521 which has a 3/4 inch ball hole diameter. Whether or not this would be an ideal solution for carrying an American flag will depend a lot on the size of the flag and pole you plan to use.
    view full answer...
  • Is Fishwire Tool Included With Curt Hitch For 2001 Honda Civic
    The Curt Trailer Hitch, part # C11204 has the fishwire tool needed for installation of the hitch. This hitch has a 1-1/4 X 1-1/4 inch receiver opening, and is a Class l hitch, and is a good fit for your 2001 Honda Civic 2 or 4 door if it is not a hatchback. The hitch will not fit Si models. All non-trailer loads - bike racks, cargo carriers and so forth - should be supported with stabilizing straps. Failure to properly support these loads will void your hitch warranty from Curt.
    view full answer...
  • Recommended Ball Mount Recommendation for Use with Curt Hitch on 2018 Honda Civic
    The problem is that Class I hitches like what you have require you to only use the recommended ball mount for that hitch. This is due to the lower capacity of the hitch not being rated for added leverage of a higher or lower ball mount. With the Curt hitch part # C11604 that you referenced you have to use the # C45521 which has a 2-5/8 inch rise.
    view full answer...
  • Troubleshooting Low Ball Mount Ground Clearance on a 2003 Chrysler Town and Country
    The Curt Class II Trailer Hitch, part # C12362, is the correct trailer hitch for your 2003 Chrysler Town and Country and the ball mount, part # C45521, is the recommended ball mount for that hitch. It is perfectly safe to turn the ball mount upside down to gain more ground clearance. This is called using the ball mount in the rise position. It is recommended for your vehicle to use this ball mount in the rise position since the trailer hitch is low to the ground. I do not recommend...
    view full answer...
  • What Ball Mount to Use with Curt Hitch C11402
    With Class I hitches like the # C11402 you have to use the recommended ball mount from Curt which is the part # C45521. Using a different ball mount would potentially damage the hitch since the length would be different and the leverage might cause damage.
    view full answer...
  • How to Pick Out a Ball Mount for Towing a Yakima Rack and Roll Trailer Level
    In order for the Yakima Rack and Roll trailer part # Y08107 to be towed level you will want to go with a ball mount that will put the hitch ball right at 22 inches from the ground. You will need to measure from the top of your hitch opening to the ground. The difference between that measurement and 22 is the amount of rise/drop you would need. Once you determine that you will want to check out the link I attached that will take you to a page that has all of the 1-1/4 inch ball mounts we...
    view full answer...
  • Compatibility of Curt Class II Drawbar # C45521 With OEM 1-1/4 Inch Receiver on 2012 Ford Escape
    The Curt # C45521 drawbar you referenced is compatible with a 1-1/4 inch receiver, as is the # F-4 hitch pin and clip. You'll want to make sure that the hitch on your Escape has sufficient capacity to handle the pop-up you're planning on towing. The first thing I'd recommend you do is to determine the capacity of the hitch. The hitch should have a sticker on it telling you if it's a Class I or a Class II hitch. A Class I hitch will have a towing capacity of up to 2000 lbs, and a tongue...
    view full answer...
  • Kayak Carrier for Track Mounting
    Inno offers a kayak carrier that mounts into the T-slots in rack bars, their Locker Watersport Carrier # INXA445. If you refer to the linked diagram you can see the slot dimensions this carrier will fit into. The carrier also needs a bar spread of no less than 24-inches, also noted on the diagram.
    view full answer...
    Image 1 for
  • Trailer Hitch for 2016 Honda HR-V to Tow Trailer for Scooter
    Since the hitches available for your 2016 Honda HR-V are lower in capacity like the Curt hitch # C18145 which has a tongue capacity of 200 lbs which would be too close to the weight of your scooter. Best option would be to tow a small trailer with your vehicle. To do that you'd also need trailer wiring like the Tekonsha part # 118673 and a ball mount like # C45521.
    view full answer...
  • Curt RockerBall for 2015 BMW 328xi Wagon
    Yes, the Curt RockerBall # C94CR meets your needs of a 2" Hitch Ball. This has a 3/4" Diameter Shank that is 2-1/8 Inch in length. If you need a drawbar for your 1-1/4" hitch I suggest the Curt Class II Drawbar # C45521.
    view full answer...
  • Trailer Hitch and Wiring Recommendation for 2018 Honda Fit
    Offically Honda states your 2018 Honda Fit is not rated for towing a trailer. Since people will still tow and there is a demand for a hitch for your vehicle we have a hitch like the Curt part # C11406 which is a confirmed fit as well as trailer wiring like # 118767. For a ball mount you'd need the part # C45521 as well.
    view full answer...
  • Can Curt Hitch that Fits 2007 Ford Mustang be Used with Ball Mount
    Yes, you can use a ball mount with the Curt hitch part # C11312 that fits a 2007 Ford Mustang but since this is a Class I hitch you have to recommended ball mount which is the # C45521. Then for a 1-7/8 inch ball you'd want the part # 19256.
    view full answer...
  • Recommended Ball Mount for Curt Trailer Hitch Receiver on 2017 Chevrolet Malibu Premier
    The Curt Class II ball mount, part # C45521, is what is recommended with the Curt Trailer Hitch Receiver, part # C12185, on your 2017 Chevrolet Malibu Premier. However, to find the correct ball mount for your trailer you should find the rise or drop you need by measuring. I've linked an article to help you with this, plus I've also linked our selection on ball mounts that will fit the Curt hitch receiver. In addition you'll need a trailer wiring harness. The Curt # C56313 fits your...
    view full answer...
  • Which Ball Mount Should be Used with Curt Hitch Installed on 2013 Toyota Corolla S
    With Class I hitches like what fits your 2013 Toyota Corolla you have to use the recommended ball mount from the hitch manufacturer otherwise you void the warranty of the hitch. For the Curt hitch # C11265 for your 2013 Toyota Corolla you can only use the Curt ball mount part # C45521 to stay in compliance with your warranty.
    view full answer...
  • Trailer Hitch Recommendation for 2010 BMW 335i with Dual Exhaust Sedan
    We do carry a hitch receiver that will fit your 2010 BMW 335i as long as you don't have a diesel engine. The Curt # C11756 is designed for your BMW. I attached a picture of it installed on a 335i with dual exhaust. If you're going to be towing then you'll also need a wiring harness and ball mount. The wiring harness for your BMW is # C59236. This will provide a 4-way trailer connector to power a trailer's lights. The recommended ball mount with the Curt hitch is # C45521. It provides...
    view full answer...
    Image 1 for
  • Trailer Hitch Receiver Confirmed to Fit 2007 BMW 335i with Dual Exhaust
    We do carry a hitch receiver that will fit your 2007 BMW 335i as long as you don't have a diesel engine. The Curt # C11756 is designed for your BMW. We have some pictures on the product page of it installed on a 335i with dual exhaust. If you're going to be towing then you'll also need a wiring harness and ball mount. The wiring harness for your BMW is # C59236. This will provide a 4-way trailer connector to power a trailer's lights. The recommended ball mount with the Curt hitch...
    view full answer...
  • Curt Trailer Hitch, Wiring and Ball Mount for 2001 Volkwagen Passat Front Wheel Drive
    Since your 2001 Volkswagen Passat is a front wheel drive version the correct Curt trailer hitch you'd need is actually the # C11054. For a ball mount you'd have to use the part # C45521 and then for wiring # C59236 that you referenced.
    view full answer...

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