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  1. Trailer Hitch Ball
  2. CURT
  3. Trailer Hitch Ball
  4. 2-5/16 Inch Diameter Ball
  5. 1 Inch Diameter Shank
  6. Shock Absorbing Ball
Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K

Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K

Item # C29FR
Our Price: $80.95
You Save: 60%
Trailer Hitch Ball
Shipping Weight: 8 lbs
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Curt RockerBall with ShockDrop technology bolts onto your standard ball mounts to provide comfort and control while towing. Chrome ball has a 1-1/4" diameter x 2-1/8" long shank. Anti-swivel, forged steel base has black powder coat finish. Great Prices for the best trailer hitch ball from CURT. Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K part number C29FR can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (106)
  • Q & A (0)
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CURT Trailer Hitch Ball - C29FR

  • Trailer Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • 1 Inch Diameter Shank
  • Shock Absorbing Ball
  • 12000 lbs GTW
  • CURT

Curt RockerBall with ShockDrop technology bolts onto your standard ball mounts to provide comfort and control while towing. Chrome ball has a 1-1/4" diameter x 2-1/8" long shank. Anti-swivel, forged steel base has black powder coat finish.


  • Hitch ball provides a connection point for your trailer's coupler
    • Fits most existing ball mounts
  • 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
  • Tested for safety to meet SAE J684 specifications
  • Lock washer and nut included


  • Ball diameter: 2-5/16"
  • Shank dimensions: 2-1/8" long x 1-1/4" diameter
  • Weight capacity: 12,000 lbs
  • 1-Year limited warranty

Note: All RockerBall hitch balls will sit 1-1/2" higher than a standard hitch ball due to the 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.

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

Curt RockerBall with SockDrop 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

Curt RockerBall 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.

Curt RockerBall Zerk Fitting

The built-in zerk allows you to lubricate the isolator core when necessary, ensuring quiet and trouble-free operation.

40249 Curt Rocker Ball with Shock Drop Technology - 2-5/16" Trailer Ball - Chrome - 12,000 lbs

Customer Satisfaction Score:

Customer Reviews

Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K - C29FR

Average Customer Rating:  4.7 out of 5 stars   (106 Customer Reviews)

Curt RockerBall with ShockDrop technology bolts onto your standard ball mounts to provide comfort and control while towing. Chrome ball has a 1-1/4" diameter x 2-1/8" long shank. Anti-swivel, forged steel base has black powder coat finish.


Received product before due date however, both our WD Hitches do not have the standard piece to allow the Anti-Rotation Plate to be useful. Pictures attached.
Checking with etrailer to see what can be done before modifying either the ball or the hitches. Only other issue was packaging, it was well packed on bottom side but not on top which allowed the product to distort the box it was shipped in but it did come fully in tact with no visible harm. Mentioning this for future delivery of such items.

Etrailer Expert

Heather A.


I was able to contact Curt and the Curt RockerBall is not compatible with weight distribution systems. It is only compatible with a ball mount that has a 1-14 diameter ball shank hole.


Good idea, though actual towing feels chaotic. Pulling a 4,500 pound camper trailer with a F150 - Max Tow Package and this hitch causes the trailer to surge back and forth when braking, accelerating and/or rolling over bumps in the road. I don't know if my hitch is defective or not, but I will not be using this hitch anymore. The other issue is, when torquing the ball hitch to the specified 450 ft/lbs - the flanges that are supposed to hold the ball in place bent and I had to find an alternative to secure it from turning.


Softens the bouncing on rough roads and bridges.


All seems great delivery was excellent product looks great but I haven’t installed it yet thought the pin was with it so do you have a very hard material pin that goes with the forged ball mount.
Let me know asap


Unique design and well made. Eliminates a lot of push and pull from the trailer.


Fantastic quality and customer service. Delivery was fast as well!


nothing special




This hitch ball works great no slamming back & forth when stopping are starting. Just the right height for my F150 with a 4 inch curt drop receiver. I would definitely purchased again. Ran it with an unloaded trailer & a trailer with weight around 2500 lb. You want be disappointed in the purchase.


Quality products. But the added height of this Curt shock absorbing rocker ball in combination with the 5-1/2” height Brophy bar, I still bottom out and scrape the inclined road to my house while towing my boat.


I just purchased a new hideaway hitch system. But the hitch sits only 15 inches off the ground at best. And, my trailer coupling is 22-23 inches off ground. So l needed 7-8 inches of rise on the new 1.25 inch receiver system.

Internet research took me to etrailer and the Brophy hitch. I got 5.5 inches with the Brophy hitch, the highest available for a 1.25 inch receiver I could find. The others are limited to 5 inches max. I added another 1.5 inches with your Curt shock absorbing hitch. Voila, with a combined 7 inches of rise and on level ground the trailer now rides perfectly level!!!! Both parts were very easy to connect.

Delivery was speedy. Thank you for saving the day and my investment in an expensive new hideaway hitch!


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.


Greatest difference is felt with a full trailer vs empty. For reference, I haul a 3700 horse trailer and with one or two horses on board, this makes a noticeable difference in the reduction of ‘jolts’ when road seams, potholes are encountered. No noticeable difference when empty, but I am rarely empty. Good value for outcome.


Works great in taking out the "jolt" when making quick stops and starts


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


Somewhat disappointed in Curt with this product and I have always been a big Curt fan. The first one of these I ordered was the listed 3" drop unit. The base of the rocker ball is almost 1 7/8" tall so on a 4 inch drop ball mount its really only a 2 inch drop hitch so be aware when ordering. I had to send the first back and reorder the larger drop unit. When I received the larger drop unit I put it in the receiver like many other hitches I have used and proceeded to properly torque the ball down. Because the rocker ball has a pivot point its very important that it stay parallel to the receiver. Curt includes a sheet metal plate that shims in between the ball mount and the ball to prevent it from turning. The plate is no where near strong enough though and at 224 ft/lb the plate bent and the ball rotated. After the plate is bent it is almost impossible to get he thing torqued down right and lined up.


Drove from San Diego to Alaska - smooth ride w/trailer...


love using the rocker ball


This all-in-one kit does everything it promises to do. I wish I'd learned about it sooner.


Kimberly, our Sales rep, was incredibly patient and amazing and guided us through our options and availability. The products arrived on time and as expected. In a world of choices you all went above and beyond any expectations.


Like most any lock they can be a little temperamental after being out in weather a while, but a shot of lock lube or WD40 takes care of that. "Training the lock to your given key is a breeze, and I definitely like the convenience of not having to try and recall which key is needed to use them!


Just received it. I haven't had a chance to use it yet, but the quality is excellent!


makes for a better ride for sure !!


Fast Service. Excellent quality

Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

  • Will Curt Rockerball Fit on Weight Distribution Head?
    The Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K # C29FR does not fit weight distribution heads because the base of the ball is meant to fit the rectangular platform. If you remove that part of the base it may work but it also could rotate so the shock absorbing may not work correctly.
    view full answer...
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  • Can The Curt RockerBall Be Used On Trailers With Surge Or Electric Brakes
    Yes, the Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball # C29FR is just a ball mount with a rubber base to absorb road shock for a more comfortable towing experience and would not have any compatibility issues with any braking systems or trailers without brakes.
    view full answer...
  • Can Curt Rockerball be Used with Weight Distribution System
    I have a cushioned solution for your WD setup but you are correct the Curt Rockerball is not to be used with weight distribution systems according to Curt. The movement that the ball allows and the stresses of the WD system just don't allow the two to fit together and work. Instead you can use the cushioned weight distribution shank part # GY54FR for a 2 inch hitch which the head of your weight distribution system can attach to. There isn't any other option to cushion a weight distribution...
    view full answer...
  • Is Convert-A-Ball Ball Mount Compatible With Curt RockerBall?
    The Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank # C29FR will not work with the Convert-A-Ball Ball Mount for 2" Hitches - 3/4" Rise, 2" Drop - 10,000 lbs # AMSC2 which has a 1 inch diameter ball hole. Using the Polyurethane of the Convert-A-Ball Ball Mount as well as a similar design in the ball may actually mitigate the shock absorption. One or the other would help but sometimes using two parts with the same thing will work against each other instead...
    view full answer...
  • Solution for Preventing Rattling Between Trailer Hitch Ball and Coupler
    We have the perfect solution for you with the Curt RockerBall, part # C29FR for 2-5/16" ball or # C40047 for a 2" ball. It completely changes your towing experience by reducing jerking and jarring while towing. It absorbs the movement and rattling of your trailer at the coupling point to provide a smoother ride and increased control over the vehicle and trailer. It also reduces the amount stress placed on your vehicle, receiver hitch, brakes and suspension system. Note: All RockerBall...
    view full answer...
  • Will the Curt RockerBall Fit on the C45340 Ball Mount?
    As long as the Curt RockerBall has a 1 1/4 shank, like the # C29FR, you will have no issue installing it on the # C45340. With you using a ball that moves though, I highly suggest adding on the Roadmaster Quiet Hitch # RM-061. This will keep the # C45340 completely stabile while in use.
    view full answer...
  • Height of Curt C82KR, C29FR and C40047 RockerBall Trailer Balls
    The 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...
    Image 1 for
  • Shock Absorbing Hitch Ball with 1-1/4 Shank and 2-5/16 Ball for 2 Ball Mounts
    If the trailer requires a 2-5/16 ball, you don't want to use the 2" ball to pull the trailer. The 2-5/16 ball has a larger shank so it is not interchangeable with the Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs Item # C63KR I recommend Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball - 1-1/4" Diameter Shank - Chrome - 12K Item # C29FR and Curt Solid Ball Mount for 2" Hitches - 3" Rise, 4" Drop - 10" Long - 12K Item # C45313. It will give you the extra...
    view full answer...
  • Can Curt RockerBall be Used with Weight Distribution
    Good question. I checked with Curt because I haven't had this come up yet but unfortunately no, the RockerBall, part # C29FR, cannot be used with a weight distribution system. Looking at your pictures I think you have a Blue Ox SwayPro system, like part # BXW0753. If I'm correct then you need a standard 2-5/16 inch ball with either a 1 or 1-1/4 inch shank. Beyond that the choice is yours so part # 63847 is a good option for a a 1 inch or part # 63840 for a 1-1/4 inch.
    view full answer...
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  • Which Provides More Cushioning from Ball Mount Convert-A-Ball Vs Curt Rebellion XD
    The Convert a Ball ball mounts like the # AMSC4HD and the Curt Rebellion XD # part # C45949-2516 offer cushioning in a similar way (front to back cushioning) but the Curt Rebellion is going to offer superior cushioning to the Convert a Ball. The reason I say this is because most of the time your ball mount would not be free to move enough for the cushioning to be effective since the tongue weight of the trailer on the ball mount prevents movement where it would be needed. With the Rebellion...
    view full answer...
  • Can I Use the 2-5/16" Curt Rockerball with My Weight Distribution System?
    I have an answer for you. Unfortunately, we confirmed with Curt that the 2-5/16 Rockerball models # C29FR and # C82KR cannot be used with a weight distribution system. If you need a 2-5/16 inch ball, I recommend the Draw-Tite # 63847 if your weight distribution system requires a 1-inch diameter shank or the Draw-Tite # 63840 if your system requires a ball with a 1-1/4 inch diameter shank.
    view full answer...

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Info for this part was:

Employee Mike L
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Employee Andrew K
Installed by:
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Employee Michael B
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