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  1. Trailer Hitch Ball Mount
  2. CURT
  3. Fixed Ball Mount
  4. Fits 2 Inch Hitch
  5. Drop - 4 Inch
  6. Rise - 3 Inch
Curt Ball Mount for 2" Hitches - 2-3/4" Rise, 4" Drop - 9-3/8" Long - 10,000 lbs
CURT

Curt Ball Mount for 2" Hitches - 2-3/4" Rise, 4" Drop - 9-3/8" Long - 10,000 lbs

Part Number: C45311
In Stock
$49.20
Retail:$72.99
You Save: 33%
Trailer Hitch Ball Mount
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In Use/Installed

Corrosion-resistant, black powder coated ball mount measures 9-3/8" from center of hitch pin hole to center of ball hole. Use it in either the drop or the rise position to fit your application. Hitch pin and clip sold separately. Great Prices for the best trailer hitch ball mount from CURT. Curt Ball Mount for 2" Hitches - 2-3/4" Rise, 4" Drop - 9-3/8" Long - 10,000 lbs part number C45311 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (3997)
  • Q & A (0)
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CURT Trailer Hitch Ball Mount - C45311

Highlights

  • 10,000 lbs GTW for Heavy Loads: Handles large trailers or boats with 1,000 lbs tongue weight capacity.
  • 4" Drop or 2-3/4" Rise for Level Towing: Lets you match trailer height for steady, even hauling.
  • 9-3/8" Shank Length for Setup Flexibility: Positions the ball mount to suit different trailer couplers.
  • Steel Build for Lasting Strength: Solid construction helps support heavy-duty towing tasks.
  • Gloss Black Powder Coat Resists Corrosion: Protects against rust and road grime over time.
  • Works with 2" Hitch Receivers: Fits standard setups using a 5/8" pin hole (pin and clip sold separately).
Made in USA

Features to know about

Keeps Your Trailer Level: 2-3/4" Rise or 4" Drop

When your trailer rides uneven, it can throw off balance and stability. This ball mount makes it easy to dial in the right height, offering a 2-3/4" rise or 4" drop so your trailer stays level. That means straighter tracking, smoother braking, and an overall steadier tow with every hookup.

Built for Serious Loads: 10,000 lbs GTW Rating

Heavy hauls demand gear that won’t flex or fail. This mount is rated for 10,000 lbs gross towing weight and 1,000 lbs tongue weight, giving you the confidence to pull large trailers, boats, or campers without worry. The sturdy steel construction stands up to tough use and stays dependable trip after trip.

Resists Rust and Wear: High-Gloss Black Powder Coat

Road salt, rain, and grime can take a toll on towing gear. The corrosion-resistant, high-gloss black powder coat finish protects the steel from rust while keeping it looking clean. It’s the kind of finish that holds up through years of everyday use and rough weather without flaking or peeling.

Solid Hitch Fit: 9-3/8" Shank for Secure Connection

Nothing’s worse than a loose or rattling hitch setup. The hollow steel shank measures 9-3/8" from the center of the hitch pin hole to the center of the ball hole, giving you a solid fit in your 2" x 2" receiver. Once pinned with a standard 5/8" hitch pin (sold separately), it locks in tight for smooth, steady towing with no drama.

Simple and Dependable: Fixed Ball Mount That Just Works

This fixed design keeps towing straightforward—no moving parts, no adjustments, just a solid connection every time. Hook up your hitch ball (sold separately) through the 1-1/4" diameter hole, slide it into place, secure it with a pin and clip, and you’re ready to tow with confidence.

Specs

Application

  • Application: 2" x 2" trailer hitch receivers

Weight and Capacity

  • Gross towing weight: 10,000 lbs
  • Tongue weight: 1,000 lbs

Dimensions

  • Length: 9-3/8" from center of hitch pin hole to center of ball hole
  • Rise: 2-3/4" from top of inside of hitch opening
  • Drop: 4" from top of inside of hitch opening
  • Ball hole diameter: 1-1/4"
  • Pin hole diameter: 5/8"

Warranty

  • Limited lifetime warranty

45311 Curt Class 4 Ball Mount - Heavy Duty 2" Square Ball Mount - 2-3/4" Rise, 4" Drop

Similar to Draw-Tite 2753





Customer Satisfaction Score:

Ratings & Reviews

4.8

3997 reviews
5 Stars
(3605)
4 Stars
(265)
3 Stars
(60)
2 Stars
(28)
1 Star
(39)
Review sort icon
Corrosion-resistant, black powder coated ball mount measures 9-3/8" from center of hitch pin hole to center of ball hole. Use it in either the drop or the rise position to fit your application. Hitch pin and clip sold separately.

by:

Products were as advertised and shipment was faster than expected/



by:

Arrived on time and looks great on my 2018 Silverado



by:

very well made equipment



by:

Excellent item. High quality, fair pric e.



by:

Seems well made with a heavy protective coating. Coating had a few chips, probably due to the ball shipped in the same box and not kept separated. I’ll treat these spots with POR-15.



by:

Works great seems heavier than other brands I have used in the past.



by:

Kevin profile picture

Kevin

9/19/2025

Excellent product!



by:

Good quality. To note: I have a 1inch lift on my 1500 and the ball point is lower than ideal. Best suited for trucks with a 3 inch lift or more.



by:

Does what it's supposed to and also great for bruising shins. I had a different brand that rusted and lost all paint after a year, wouldn't do that again. This one seems to retain paint better and not get all rusty.



by:

Perfect for me I know I will never have a failure



by:

I have bought from E trailer before. They have the specific tow rated item I am looking for that I can't find locally.



by:

I just installed it today it appears to be extremely heavy duty and well-made. Time will tell.



by:

Heavy duty! Great powder coat.



by:

Fantastic price and arrived at my doorstep two days after I placed my order. Couldn't be happier.



by:

I really enjoyed the whole process. First time ordering and had no issues. I like how specific the tracking information was presented and the product arrived a day early and undamaged. Will definitely shop again!



by:

Info on site made it easy to select the right product I needed for my application. Exactly what I was looking for. Great build quality.
Product was delivered quickly and in great shape.
Thanks etrailer



by:

I use this draw bar with my 7800 Tritoon Trailer. To date it has worked as designed.



by:

Exactly what I needed at a great price. These are also very nicely finished, good looking parts. Only the best from etrailer.



by:

Good product. Trailer sits level. Seems to be good quality. Fast shipping.



by:

Bought this to tow a 7500 lb boat trailer. This ball mount is beefy. The welding and finish are excellent and made in the USA.



by:

First time ordering from etrailer......great experience. They made sure I got the proper equipment for my towing, and it arrived in 2 days. Excellent quality....I'll be ordering again from them!



by:

THE BALL MOUNT OR LET'S SAY STEPPING UP TO THIS CURT SIZE BALL MOUNT PROVIDED GREATER STABILITY, IT WAS A SOLID FIT WITH LITTLE TO NO MOVEMENT, JUST LOVING IT!!!!



by:

etrailer is an excellent source for any trailer hitch towing needs. Greg S. whom took my order was very pleasant to work with and knows his business. I had an email notification within about an hour from placing the order that my part had been shipped and contained the easiest shipping tracking information I have ever used. I ordered the part on 3/28/2019 and our USPS mail man delivered the part on 3/30/2019. You could not ask for any better service than that. The part is quality and finish is excellent. etrailer will be my first choice for any future trailer hitch towing needs.



by:

This is a high quality product that works great for pulling our side-by-side trailer. However, the shank (rectangular tube that inserts into the vehicle receiver) is quite long. This could cause issues if the chains on your trailer are fairly short because it pushes the trailer further back from the vehicle. Other than that, this is a great product.



by:

Very nice product. I wish the mounting hole for ball was smaller.


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

  • Where to Measure to Determine Correct Rise/Drop for Ball Mount
    Since there aren't any zero rise/drop ball mount options (shockingly) you might verify that your setup was measured in the right spots. You'd want to measure from the bottom of the coupler lip down to the ground when the trailer is level and then from the top of your hitch opening down to the ground. The part # D320 has a drop of 2 inches and comes with the tab needed for friction sway control. This probably would be close enough to what you'd need.
    view full answer...
  • Shank Length of Curt C45311 Class III Ball Mount
    The distance from the center of the hitch pin hole to the gusset welded onto the Curt # C45311 is 4 inches, as shown in the provided photo. If you're wanting something with a longer shank for additional clearance, I'd recommend the Curt # C45270 which would offer a similar rise/drop but with a shank that's 8 inches long, measured from the center of the hitch pin hole to the closest part of the ball platform. The ball mount is rated for 7500 lbs. I've also provide a photo of this ball...
    view full answer...
    Image 1 for
  • What Ball Mount Is Needed for a 4x8 U-Haul Cargo Trailer with a 2013 Hyundai Santa Fe
    The etrailer.com Trailer Hitch Receiver part # E98841 when we installed it on a 2013 Hyundai Santa Fe was 13" from the ground to the top inside edge of the receiver tube. I called U-Haul and they said that the coupler height of the 4x8 cargo trailer is around 16" from the ground to the bottom of the coupler while level therefore you will need to use the Curt Ball Mount for 2" Hitches part # C45311 with the 2" Hitch Ball part # A-90.
    view full answer...
  • How to Determine Ball Mount Rise or Drop for 2018 Ford Edge
    Thanks for the order of the Draw-Tite Trailer Hitch # 75234 and when we test fit it on a 2018 Ford Edge, you are correct that the distance from the top of the receiver to the ground was 12-1/2". In regards to the height of the Draw-Tite # 36501, when we test fit it on a 2009 Ford Escape the top of its receiver to the ground was 16-3/4", though that's not a height you will want to use to determine the ball mount you'll need. In order to choose the correct ball mount, there are a couple...
    view full answer...
    Image 1 for
  • Ball Mount with 4 inch Drop, 2 inch Ball, and 10k Weight Capacity
    I have a similar solution that will work great for you but we don't have exactly what you are looking for with a hitch ball installed as well. So instead the best way to accomplish what you are looking for is with a fixed ball mount part # C45311 which has the 4 inches of drop, 10k capacity, and fits a 2 inch hitch. For a 2 inch ball to then fit this you'd want the # A-90 which also has a 10k capacity and you'd be set.
    view full answer...
  • Compatibility of Curt Trailer Hitch and Additional Towing Accessories for 2016 BMW X1
    I will go down the list of products that you mentioned in terms of their compatibility with each other. The Curt Trailer Hitch Receiver # C13303 referenced in your question is a Class III trailer hitch with a 2 inch receiver opening. It is confirmed to fit your 2016 BMW X1 and will work very well. The Curt Euro Style Drawbar # C45572 that you also referenced is a Class II ball mount designed for 1-1/4 inch receivers. This will not be compatible with the 2 inch receiver on the above...
    view full answer...

Do you have a question about this Trailer Hitch Ball Mount?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Ryan G
Installed by:
Ryan G
Employee Chelsea B
Written by:
Chelsea B
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Mike S
Updated by:
Mike S
Employee Isabelle B
Updated by:
Isabelle B

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