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Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K
(138 reviews)
Price: $49.95
In Stock
CURT
Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K
Part Number: C40047
In Stock
$49.95
Retail:$68.99
You Save: 28%
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- All Info
- Reviews (138)
- Q & A (0)
- Photos
- Used (1)
CURT Trailer Hitch Ball - C40047
- Trailer Hitch Ball
- 2 Inch Diameter Ball
- 1 Inch Diameter Shank
- Shock Absorbing Ball
- 7500 lbs GTW
- CURT
Curt RockerBall with ShockDrop technology bolts onto standard ball mounts to provide comfort and control while towing. Durable, chrome ball has a 1" diameter x 2-1/8" long shank. Anti-swivel, forged steel base has black powder coat finish.
Features:
- Hitch ball provides a connection point for your trailer's coupler
- Fits 2-1/2" wide ball mount tongues
- Integrated ShockDrop technology
- Cushioned isolators reduce rattling and vibration for a more comfortable ride
- Reduces shock loads to the vehicle during sudden braking or acceleration
- Minimizes stress on tow vehicle's suspension and brakes for extended longevity
- Fine threads provide tight, strong grip
- Anti-swivel base is constructed of forged steel for dependable towing power
- Durable carbide black powder coat finish on base
- Corrosion-resistant chrome finish on ball
- Virtually maintenance-free with no airbags or bearings to service
- Built-in grease zerk makes it easy to lubricate when necessary
- Molybdenum-based grease (LM54FR - sold separately) only recommended
- Built-in grease zerk makes it easy to lubricate when necessary
- Tested for safety to meet SAE J684 specifications
- Lock washer and nut included
Specs:
- Ball diameter: 2"
- Shank dimensions: 2-1/8" long x 1" diameter
- Weight capacity: 7,500 lbs
- 1-Year limited warranty
Note: All RockerBall hitch balls will sit 1-1/2" higher than a standard hitch ball due to their shock absorbing base.
The mounting platform on your ball mount must be at least 3/8" thick and the hole size must not be more than 1/16" larger in diameter than the ball's threaded shank.
Not to be used with a cushioned ball mount.
Towing can be brutal, especially when your setup is outfitted with standard, metal-on-metal components. Steel and aluminum can only absorb so much vibration and chucking, so every time you hit a bump in the road, that shock gets transferred to the rest of your rig, leaving it vulnerable to wear and tear. Another unfortunate side effect is an uncomfortable ride for you and your passengers.
Protect your truck and trailer from road shock, vibrations, and rattling - and stay comfortable while you drive - with the shock-absorbing Curt RockerBall hitch ball.
Shock Absorbing ShockDrop Technology
The RockerBall hitch ball features Curt's innovative ShockDrop technology, which is engineered to suppress vibrations and rattling while you're towing. When you hit a bump, the ball compresses around the flexible, polyurethane core. This durable material absorbs excess shock at the coupling point so that it doesn't transfer from the truck to your trailer or vice versa. The result is increased control and comfort as you tow, as well as less wear and tear on your towing setup.
Premium Construction
This hitch ball is built to last with its forged steel construction and durable powder coat finish. The flexible, shock-absorbing polyurethane core withstands extreme heat for long-lasting performance, and the chrome-plated ball resists corrosion.
The built-in zerk allows you to lubricate the isolator core when necessary, ensuring quiet and trouble-free operation.
40047 Curt Rocker Ball with Shock Drop Technology - 2" Trailer Ball - Chrome - 7,500 lbs
Installation Details
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- etrailer mistake
- Product did not meet expectations
- Wrong item was ordered
Ratings & Reviews
4.7
138 reviews
by:
Jay
06/22/2026
I didn't know what i was missing with this rocker ball from Curt. It has proven to provide a smoother towing experience!
by:
Gregory
05/30/2026
Great addition to any hitch, cushions the bumps, especially in glorious stop and go traffic on memorial day!
by:
Edward
10/27/2026
Huge difference with this tow ball it eliminates the forward jerking of truck and trailer very smooth towing now huge difference.
by:
Noah
04/16/2024
I was in the market.
Looking for some kind of dampening hitch.
But all the hitches I found We're over $300. I stumbled upon the Curt rocker ball . It was interesting to me so I had looked up some reviews on it. There wasn't any good reviews on it, but there also wasn't any bad reviews either.
So I decided to give it a shot,
Since it was pretty Inexpensive. Since then, I've had it for a year and a 1/2 now And it's been amazing.something so simple,That works very well. You won't notice it as much if the trailer already tows very well But the trailers that do a lot of jerking You will feel the difference.
A night and day difference.to me it reduced it by By 80%. Very good product!
Looking for some kind of dampening hitch.
But all the hitches I found We're over $300. I stumbled upon the Curt rocker ball . It was interesting to me so I had looked up some reviews on it. There wasn't any good reviews on it, but there also wasn't any bad reviews either.
So I decided to give it a shot,
Since it was pretty Inexpensive. Since then, I've had it for a year and a 1/2 now And it's been amazing.something so simple,That works very well. You won't notice it as much if the trailer already tows very well But the trailers that do a lot of jerking You will feel the difference.
A night and day difference.to me it reduced it by By 80%. Very good product!
by:
Adam
06/11/2026
So far it’s perfect for my needs. It is light weight and sticks out just past my spare tire on Bronco.
by:
Alan
03/31/2026
I ordered this due to a video "Playing with Sticks" by Drew. The ordering, shipping, and delivery was prompt. I have not used the product yet so I have no feedback on that. Once I have used it I will addendum the product.
by:
Jed
04/27/2026
my rockerball rocks
by:
P
09/12/2025
Total junk. The mounting plate, which is supposed to keep the rocker ball parallel to the tow vehicle, is way too wide for the two different hitches I tried. When tightening the locking nut, the hitch ball turns significantly out of parallel alignment. But worse, when I attempted to torque the shank nut to the specified 250' lb., the retainer plate bent, and I was not able to tighten the ball per the specification
by:
D1
10/06/2025
Fitment was ok. It does not sit flat against the hitch mounting surface when installed.
by:
Robert
03/26/2025
Smooths and quiets tow vehicle ride, but ball rusts quickly and significantly.
I bought this for function not asthetics, so Im glad I bought it, but took one star away for the rust. Wish it was made of stainless steel like other premium hitch balls.
I bought this for function not asthetics, so Im glad I bought it, but took one star away for the rust. Wish it was made of stainless steel like other premium hitch balls.
by:
Dean
03/05/2026
It's really good so far
by:
Jerry K
02/27/2021
Changed over from the conventional Ball. Noticeable difference after installing Rockerball. Makes the ride quieter and when braking no noises and no trailer play when braking or accelerating. recommended Product.
Jerry K.
2/28/2022
Works Great. No wear or tear on the Rockerball and I’ve used it well over 25 times. Good as Mew.
by:
Paul
10/25/2025
Excellent Item! Will buy again.
by:
James
12/07/2020
I pull a Teardrop trailer with my SUV and the Curt RockerBall has definitely take some of the road vibrations and harshness out of towing. Highly recommended.
by:
Bruce
03/09/2020
Quality looks great won’t be putting on the truck till the snow is gone deliver early thanks etrailer
Bruce
3/10/2021
Great good product
by:
William
09/29/2021
Great product. Simple compact design. Dampens movement between tow vehicle and trailer. Makes for a smoother towing experience.
by:
Chris
09/05/2025
I could not use on the hitch I pull camper. It was to wide! Hope to give it to someone who can
by:
Vincent
04/27/2020
Well made and packaged. Instructions are simple and thorough with helpful pictures. I haven't had a chance to use it but it appears that it will function as claimed.
William in customer service has been in contact and very helpful in expediting the remainder of my order.
Great quality, customer service, shipping and prices.
Thanks and be safe and well
William in customer service has been in contact and very helpful in expediting the remainder of my order.
Great quality, customer service, shipping and prices.
Thanks and be safe and well
by:
Rick
11/30/2023
on our NEW Ram 1500 truck this ball helps reduce the trailer vibration that gets transferred into the truck. it definitely helps with a smoother ride.
by:
Scott
03/07/2021
Who has a machine to tork a 250 ft lb nut? I found someone who had a manual tork wrench that could handle that much. Luckily he was huge enough to tighten it. But it still was crooked on the
by:
Walter
04/16/2020
got my order opened it up and found the chrome had a flaw called etrailer carol super service they are shipping me a new one thanks carol you made my day haven't tried yet snow on the ground in Michigan this looks like just what I need 5 stars
by:
Walter
04/16/2020
got my order opened it up and found the chrome had a flaw called etrailer carol super service they are shipping me a new one thanks carol you made my day haven't tried yet snow on the ground in Michigan this looks like just what I need
by:
Lane
08/23/2021
You guys always provide the best service. The rocker ball smoothed out my boat trailer towing just as advertised. Looking forward to my wheel and tire package coming next.
by:
Chris
05/28/2023
I received my order one day late but everything turned out good and I already tried out the ball hitch and lock assembly and seems to tow pretty good so far
by:
Mark
11/10/2021
Heavy duty hitch ball, stops some of the jerking
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See what our Experts say about this CURT Trailer Hitch Ball
- Does Curt Rockerball Have to Be Used in Curt Ball Mount/HitchThe Curt RockerBalls like the part # C40047 do not require the use of a Curt ball mount or trailer hitch. They can be used in essentially any brand of ball mount or hitch.
view full answer... - Recommended Rise for Ball Mount on 2022 Subaru Outback Wilderness Towing Escapod TopoThe Curt RockerBall Anti-Rattle Towing Kit # C43KR takes the additional height of the base of the RockerBall into account for the listed 4" rise and 5" drop. I have attached an image below showing how it is measured. Typically, you find the correct rise and drop by measuring the distance from the ground to the top of your receiver hitch opening and subtracting the distance from the ground to the bottom of the coupler. This should be done with your vehicle loaded for accuracy, you do not...
view full answer...
- What is the Difference Between the Curt Rockerball # C40047 and # CU46FR?Hello Mark, This one had me stumped. I compared our product pages, saw nothing. I went on CURT's website and found one extra word in the product details: "Packaged." Yes, that is all. They are packaged differently. As you'll see in the pictures I attached, the Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K # CU46FR comes with that lovely little orange box attached. The Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K...
view full answer... - What is Difference Between 2 inch Curt Rockerballs # C40047 and # CU46FRHey Greg, this is a really good question and one that had me scratching my head for a second but for all intents and purposes the part # C40047 and the # CU46FR are the exact same. The packaging is only actual difference but the ball itself is the same. At some point we will probably just carry the one part number.
view full answer... - Ball Mount For 2002 Toyota Sienna With Curt Hitch C13511 For Towing U-Haul TrailerI can help you out with the right ball mount and hitch ball for your 2002 Toyota Sienna so you can tow a U-Haul trailer with the Curt Trailer Hitch Receiver # C13511. When we installed this hitch on a 2002 Sienna, we found that the distance from the ground to the top of the hitch receiver was 13-1/2 inches; since the bottom of the U-haul coupler is going to be 18-1/2 inches from the ground (that is what they mean when they say "optimal ball height" as that is how far off the ground the...
view full answer... - Availability of Curt RockerBall Setup With Longer ShankThe only option that comes from Curt is the # C45WR with the 7-1/2" ball mount length. If you want a longer ball mount you would have to put one together. You could use the Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047 along with something like the # D-4 which is 10-1/4" long. Make sure to measure so you get the right length. Then you will need to attach the Curt Weld-On Sway Control Tab # C45822.
view full answer... - Best Solution to Help With Bounding in a 2016 Ford F-150 When Towing a Transcend 260 32 TTThanks for reaching out, Mark. I can definitely understand what you’re describing, that “bouncing” feeling on rough roads can get old quick, especially coming from a larger truck set up. You’re already off to a great start with a weight distribution hitch. What you’re feeling now is more of that up-and-down motion from the truck’s rear suspension under load. For that, adding something like the SumoSprings Solo Custom Helper Springs # SSR-117-47 is going to make the biggest difference....
view full answer... - What Type of Grease Needs to be Use with Curt RockerballHey Andrew, Curt is pretty adamant that you have to use a Moly blend grease with the Rockerballs like with the part # LM54FR so that would be what we would have to recommend you stick with.
view full answer... - Will a Curt RockerBall Work w/ the Aluminum Curt Ball Mount for 2" Hitches?Yes, it will Josh! The Curt Ball Mount for 2" Hitches item # C45290 has a 1" diameter hole. You can use the Curt RockerBall Shock Absorbing 2" Hitch Ball item # C40047 or the 2-5/16" Hitch Ball item # C82KR. Both of them have a 1" diameter shank. What kind of tow vehicle do you have?
view full answer... - Recommended Ball Mount W/ 5" of Rise for a Volvo XC90 Rebekah, so unfortunately the Curt RockerBall # C40047 won't physically fit on your Curt Rebellion XD # C83WR so the two can't be used together. What you could do instead is, use the Curt Ball Mount for 2" Hitches # C45336 instead which will work with the Rockerball and has that 5" of rise you're looking for and then get the Replacement Sway Control Tab for Weight Distribution System # 3442 welded on so you can use a weight distribution system.
view full answer... - Anti-Rattle Device for Subar Ascent Towing CamperHey Lewis, actually what you are experiencing is looseness between the ball mount and the hitch tube so all you need is an anti rattle device to get rid of that. For that we have the anti rattle part # e99007 which will hold the hitch tube tight to the ball mount and get rid of that sound.
view full answer... - Is Brophy Aluminum Ball Mount Compatible with the Curt RockerBall Shock Absorbing 2" Hitch BallThanks for reaching out again, Jason! Yes, the Brophy Ball Mount # EA40 is compatible with the Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047.
view full answer... - Height of Curt C82KR, C29FR and C40047 RockerBall Trailer BallsThe height of the Curt RockerBall from the base that sits upon the ball mount to the top of the ball is as follows: - 2-5/16 inch ball with 1 inch diameter shank, # C82KR is 4.607 inches - 2-5/16 inch ball with 1-1/4 inch diameter shank, # C29FR is 4.712 inches - 2 inch ball with 1 inch diameter shank, # C40047 is 4.091 inches I've provided a diagram showing these dimensions.
view full answer...
- What Grease Is Needed To Lubricate The Curt RockerBall?The Curt RockerBall # C40047 requires a Molybdenum-based Grease # LM54FR. It is not acceptable to use the LubriMatic LMX Industrial Strength Grease # L11390. This information is found in the instructions linked below.
view full answer... - Does The Curt RockerBall Shock Absorbing Hitch Ball Have More Of A Rise Compared To A Standard BallYou are correct the Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K part # C40047 does have a rise. On a standard hitch ball it sits flush with the ball mount but the RockerBall has the included height of the shock absorber which makes it about 1-1/2" taller than a standard ball. This is important when choosing a ball mount. You want to choose a ball mount that has an additional 2" of drop if your ball mount is in the drop position. For example if your...
view full answer...
- How Tall is Curt Rockerball # C40047 Above Ball Mount PlatformFrom the base of the # C40047 up to the top of the ball measures 4.091 inches. This is about 1-3/8 inches taller than a standard ball.
view full answer...
- Can A Convert-A-Ball Cushioned Ball Mount Be Used With A Curt RockerBall?Though the Convert-A-Ball # AMSC2 cushioned ball mount and the Curt RockerBall, like the # C40047, are very nice products and will help with chucking and vibrations, they cannot be used together. You are correct in that they will help with the same issues, but may actually end up causing more problems than counteracting them when used together. With that being said, either of these are great options, but it should be noted that the RockerBall hitch balls will sit 1-1/2" higher than a standard...
view full answer... - Will the Curt RockerBall Shock Absorbing Hitch Ball Work With a Weight Distribution SystemThe Curt RockerBall Shock Absorbing 2" Hitch Ball part # C40047 will not work with a weight distribution system because the flange that gets wedged between the platform and base that stops the unit from rotating will not fit over the shank on a weight distribution system. Therefore, the Curt RockerBall must be used with a standard ball mount like the Curt Ball Mount for 2" Hitches part # C45310. If you are looking to add a shock absorbing feature to your weight distribution system you'll...
view full answer... - Will Curt RockerBall Fit Curt Ball Mount w/ Sway Control Tab for 2" HitchesThe anti-swivel base on the # C45WR is missing a tab on one side to make it compatible with the sway control tab. This does not adversely impact the performance. You can use the # C40047 with the # D320 but you would have to bend or cut one of the tabs off of the anti-swivel base to make it fit since it is not available without the tab for the 2" ball.
view full answer... - What if Grease Zerk Breaks Off Curt RockerBallThe ball must be greased when using the Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047. As you can see by the cut out of the linked instructions, if you don't have adequate lubrication the ball can fail so it is imperative you do. The zerk itself isn't replaceable, you need to to replace the RockerBall. Thankfully it sounds like it is new so the ball is under 1-year warranty.
view full answer...
- What Do I Need To Add Electric Brakes To My Carry All Trailer?We can definitely get you all the parts needed to add brakes to your trailer, but it is going to be an extensive list since there currently isn't anything on the axle. I did include an article regarding just this kind of situation, but lets get started. First things first, you will need something for brakes to mount onto. This will be done by having the Brake Mounting Flange # 4-34 welded onto the axle. This will need to be done by an experienced welded as the spacing and placement has...
view full answer...
- Does Curt RockerBall C94CR Have More Cushion Than Curt RockerBall C40047The 3,500 lb capacity Curt RockerBall Shock Absorbing 2" Hitch Ball # C94CR (40246) does not have a softer cushion than the 7,500 lb RockerBall # C40047. The cushioning is the same and the difference between these two is the capacity, of course, as well as the shank size. The RockerBall # C94CR has a 3/4" diameter shank (so that's the size ball mount hole they fit) and the # C40047 has a 1" diameter shank. As for # C40047 and # CU46FR, they are exactly the same. I believe Curt uses different...
view full answer... - Moly Grease to Use with Curt RockerballWe do carry Moly grease like with the LubriMatic Moly EP grease part # LM54FR which would work great with the Curt Rockerballs like the part # C40047 that you referenced.
view full answer... - Can The Curt RockerBall Be Used With Convert-A-Ball Shock Absorbing Ball Mount? I personally spoke to Curt who informed me their Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047 should not be used with the Convert-A-Ball Ball Mounts including # CAB-UM. For the best experience I recommend using a ball mount with the correct amount of drop with the RockerBall and a anti-rattle. This will eliminate the play between the ball mount and your receiver allowing the RockerBall to absorb the trailer shock. We have a couple kits which have all the parts listed below otherwise...
view full answer...
Do you have a question about this Trailer Hitch Ball?
Used Items Available
Condition: Installed
Notes: Item has been previously test fitted and has minor cosmetic sings of use.
Info for this part was:
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Edited by:
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Installed by:
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Installed by:
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Lazer S.
10/27/2026
Glad to hear it's working well for you, Edward! What kind of trailer have been towing with it?