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  1. Trailer Hitch Ball Mount
  2. CURT
  3. Fits 2 Inch Hitch
  4. Fixed Ball Mount
  5. Drop - 3 Inch
  6. Rise - 2 Inch
Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs

Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs

Item # C63KR
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Retail:$138.07
Our Price: $125.79
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Trailer Hitch Ball Mount
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Shipping Weight: 13 lbs
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Curt RockerBall with ShockDrop technology provides comfort and control while towing. Corrosion-resistant, black powder coated ball mount measures 8-1/4" from center of hitch pin hole to center of ball hole. Includes anti-rattle kit. Lowest Prices for the best trailer hitch ball mount from CURT. Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs part number C63KR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (53)
  • Q & A (0)
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  • Why etrailer?

CURT Trailer Hitch Ball Mount - C63KR

  • Fits 2 Inch Hitch
  • Fixed Ball Mount
  • Drop - 3 Inch
  • Rise - 2 Inch
  • 2 Inch Ball
  • One Ball
  • 7500 lbs GTW
  • Shock Absorbing
  • CURT
  • Steel Shank - Gloss Black
  • Chrome Ball

Curt RockerBall with ShockDrop technology provides comfort and control while towing. Corrosion-resistant, black powder coated ball mount measures 8-1/4" from center of hitch pin hole to center of ball hole. Includes anti-rattle kit.


Features:

  • Ball mount with ShockDrop hitch ball lets you hook up your trailer to your tow vehicle
    • Shank slides into hitch receiver on your vehicle
    • Ball provides connection point for trailer coupler
  • 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
    • Virtually maintenance-free with no airbags or bearings to service
  • Fine threads on ball provide tight, strong grip
  • Anti-swivel ball base is constructed of forged steel for dependable towing power
    • Durable carbide black powder coat finish
  • Corrosion-resistant chrome finish on ball
  • Tested for safety to meet SAE J684 specifications
  • High-gloss black powder coat finish on sturdy steel ball mount resists rust
  • Anti-rattle kit stops rattling and prevents swaying of load
    • Threaded pin allows bracket to be tightly installed
    • Constructed from high-strength steel
    • Protected by a durable yellow zinc-plated finish


Specs:

  • Application: 2" x 2" trailer hitch receivers
  • Gross towing weight: 7,500 lbs
  • Tongue weight: 750 lbs
  • Ball diameter: 2"
  • Shank dimensions: 2-1/8" long x 1" diameter
  • Ball mount length: 8-1/4" from center of hitch pin hole to center of ball hole
  • Drop: 3" from top of inside of hitch opening
  • Rise: 2"
  • Pin hole diameter: 5/8"
  • Limited lifetime warranty


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.


How to Measure Drop on Standard Ball Mount

45050 Curt Ball Mount for 2" Hitches - 2" Rise, 4" Drop - 8-1/4" Long - 7,500 lbs

C69HR Curt Anti-Rattle Kit for 2" Trailer Hitches

40047 Curt RockerBall Trailer Ball w/ ShockDrop - 7,500 lbs - 2"

Installation Details C63KR Installation instructions




Customer Reviews

Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs - C63KR

Average Customer Rating:  4.6 out of 5 stars   (53 Customer Reviews)

Curt RockerBall with ShockDrop technology provides comfort and control while towing. Corrosion-resistant, black powder coated ball mount measures 8-1/4" from center of hitch pin hole to center of ball hole. Includes anti-rattle kit.

- C63KR
by:

The hitch works great as advertised. A great company to deal with along with their prices.


Comments
As if it was still new. Great product.
Michael O - 03/05/2022


- C63KR
by:

So I’ve been wanting the rocker ball for a while now and I’ve finally bought it. I bought the kit and it comes with a regular curt hitch, anti rattle kit, and the Rocker Ball. Construction seems solid on all Items. The hitch did arrived with a small area the size of half a penny of the powder coating chipped. I think it might’ve occurred during transit. Installation is fast BUT and a big BUT is very difficult to keep the rocker ball aligned to the hitch while you are torquing the nut. Mine ended up being noticeable sideways when I finished torquing it. I had to try it a couple of times and even then I couldn’t torque it all the way without 1. The rockerball assembly going sideways and 2. Without the tabs on the metal bracket bending.( one corner did bend. Anyways seems like a good product and if you don’t care of the Rockerball not being sorta aligned ( I honestly think that it shouldn’t be of fwhen fully tightened because then the rocker ball is not going to move straight back and straight forward) then I supposed it’s ok... If you are like me that gets bothered by details like this then find something else. I would’ve returned it but I scratched the hitch trying to get the Rockerball sorta aligned. Anyways take my experience with a grain of salt and good luck.



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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.


Comments
Works Great. No wear or tear on the Rockerball and I’ve used it well over 25 times. Good as Mew.
Jerry K - 02/28/2022


- C43KR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Ball is not mounted. Pictures and videos show ball mounted. And when I have bought a “kit” in the past, the ball was mounted. I can’t attach the ball myself and only reason I purchased from eTrailer was that pictures implied that the ball would be mounted.


Comments
This ball mount comes to us from the manufacturer as a kit, without the ball mounted to the ball mount. We do have a ball mount with a 4 inch that comes with the ball torqued. It is part # C45154
Curt Fusion Ball Mount for 2" Hitches - 2" Ball - 4" Drop - 7,500 lbs
$28.44
.
-- Etrailer Expert Jenny N - 02/22/2022


- C43KR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Nice solid piece with weight. The only issue I have is that the ball is only secured down with a bolt and not lockable to prevent theft.



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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.


Comments
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.
-- Etrailer Expert Heather A - 06/16/2020


- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Quality looks great won’t be putting on the truck till the snow is gone deliver early thanks etrailer


Comments
Great good product
Bruce - 03/10/2021


- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Great product. Simple compact design. Dampens movement between tow vehicle and trailer. Makes for a smoother towing experience.



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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.



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Got to say I love these for keeping that jerking motion at a minimum-easy to install



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


product works great i would definetly buy it again



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Heavy duty hitch ball, stops some of the jerking



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


makes for a better ride for sure !!



- C82KR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Best ball on the market



- C94CR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


great service fast shipping



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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 Thx



- C43KR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Very good quality and fast delivery.



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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.



- C82KR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


I purchased this to test out. I’m using it on a Ford Ranger and towing a 6x16 enclosed trailer. Curt makes great products I’m sure it won’t disappoint.



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Works as advertised.



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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.



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


Really delighted at fast delivery and quality of product as well as ease of installation. Worst part was getting old bolt off but was my kind of switch-over and I needed the extra 1 1/2 inches because I was a little heavy on the tongue for my boat. Would recommend



- C40047
by:

Review from a similar RockerBall in Trailer Hitch Ball Mount


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


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Ask the Experts about this CURT Trailer Hitch Ball Mount

  • Can Curt Rockerball be Used with Surge Brakes on Trailer
    The Curt Rockerballs like the # C63KR will not interfere with your surge brakes. The movement they allow would not prevent the inertia of your vehicle applying the brakes from activating your surge actuator.
    view full answer...
  • Recommended Ball Mount That Eliminates Rattle For My Jet Ski Trailer
    When it comes to eliminating rattle while pulling your light weight trailer The Curt RockerBall Anti-Rattle Towing Kit - 2 inch Ball - 8-1/4 inch Long Mount - 7,500 pounds # C63KR will get the job done for you. The ball mount has a high-gloss black powder coat finish on a sturdy steel ball mount that helps prevent rust. The mount has a threaded pin which allows the bracket to be tightly installed and helps stop the rattling and prevents the swaying while hauling loads. The mount has cushioned...
    view full answer...
  • What Ball Mount Comes with Curt Rockerball Ball Mount Kit with 3 inch Drop C63KR
    The ball mount that comes with the # C63KR has a 3 inch drop but since you already have the ball all you'd need is the ball mount of the kit which would be part # C93KR. The Rockerball is not available with a 50 mm ball size.
    view full answer...
  • Shock Absorbing Hitch Ball Mount Compatibility
    The Curt Rockerball Shock Absorbing Hitch Ball has anti-Rotation Plate that is not compatible with all hitch mounts. This hitch ball is recommended to be mounted onto standard ball mounts not shock absorbing ones. I recommend the Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount item # C63KR.
    view full answer...
  • Gen-Y or Curt RockerBall For 300-400 lb Tongue Weight in 2 Inch Hitch
    For your tongue weight, you are right about the Gen-Y Glyder like # 325-GH-12001 not being the best option as that requires a tongue weight of at least 400 lbs to reap the benefits. So for your tongue weight below that, I recommend the RockerBall for the best shock absorption. The Convert-A-Ball and its polyurethane interior won't give you as much cushioning as the RockerBall (which is not compatible with the Convert-A-Ball or other cushioned ball mounts), which is why I like it more....
    view full answer...
  • Compatibility of Gen-Y Glyder Shock Absorbing Ball Mount With Surge Brakes and Lower Tongue Weight
    There will be no issues with using surge brakes along with the Gen-Y Glyder Shock Absorbing Ball Mount for 2" Hitches - 6" Drop - 7K # 325-GH-12005. Also, the Glyder can be used with a lower tongue weight and an empty trailer. The only problem is you need to be at the 4-700 lb range in order to benefit from the built-in shock absorption. If your loaded tongue weight is going to be 250-300 lbs then I would not recommend using this ball mount. Instead, I would recommend the Curt RockerBall...
    view full answer...
  • Is There a Curt RockerBall Anti-Rattle Towing Kit with 2" Ball and 3" Drop
    It sounds like you are looking at the Curt RockerBall Anti-Rattle Towing Kits but wanting one with a 2" hitch ball and 3" drop ball mount. If that is the case then you will just need to use part # C63KR. In regards to the Convert-A-Ball Ball Mount like part # AMSCV-2, they both use a polyurethane bushing to reduce shock. The benefit however of the RockerBall is that it can be lubed so it will ideally last longer and reduce noise more.
    view full answer...
  • 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...
  • Recommended Ball Mount for 2017 Ford F-150 with 16.5" Coupler Height
    In order to choose the correct ball mount you'll need to measure from the ground to the top inside edge of the trailer hitch and then subtract the distance from the ground to the bottom of the trailer coupler while level. If this is where you measured from then you'll need around a 3" drop. The Curt RockerBall Anti-Rattle Towing Kit part # C63KR or B&W Tow & Stow 2-Ball Mount part # BWTS10033B are excellent options for this.
    view full answer...
  • Comparing Gen-Y and Curt Shock Dampening Ball Mounts
    It sounds like you are trying to get the best hitch mounted suspension for your vehicle to not transfer the shock. The Gen-Y Glyder Shock Absorbing Ball Mount for 2" Hitches - 2" Drop, 3-1/2" Rise - 7K # 325-GH-12001 will absolutely work better for that based on design than the Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs # C63KR. Both will absorb some shock with the dampening technology.
    view full answer...
  • Recommended Locking Hitch Pin For Curt RockerBall Towing Kit # C63KR
    The Curt RockerBall Anti-Rattle Towing Kit - 2" Ball - 8-1/4" Long Mount - 7,500 lbs # C63KR you were looking at has a 2" hitch ball with a 7500lb towing capacity, and for a locking hitch pin you can use the etrailer Trailer Hitch Receiver Lock for 2" Hitches # e98880. This will replace the anti-rattle hitch pin and plate, so for an anti-rattle device you can also add the etrailer Anti-Rattle Hitch Stabilizer # e99007 to keep the hitch from rattling in your trailer hitch receiver. I included...
    view full answer...
  • Does the Curt Trailer Hitch Fit My 2021 Audi Q5?
    Yes! I confirmed it with Curt as well and the Curt Trailer Hitch Receiver # C13331 is a fit for the 2021 Audi Q5. We haven't test fit it on one yet, but I attached the install video on a 2019 Audi Q5 and it should have a similar process. If you're using it for towing, we also have wiring kits like # 119190KIT and hitch ball kits like # C63KR.
    view full answer...
  • Curt RockerBall and Convert-A-Ball Compatibility With A 5,000LB Boat Trailer
    The Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047 cannot be used with a shock absorbing ball mount like the Convert-A-Ball Ball Mount # AMSC2. It can also not recommend by Curt to be used with surge brake couplers. I recommend using a standard style ball mount with a anti rattle hitch pin for a trailer that does not have a surge brake coupler. This can be found in a kit like the Curt RockerBall Anti-Rattle Towing Kit # C63KR. Remember that the RockerBall adds 1-1/2" to your receiver...
    view full answer...

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Info for this part was:

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Installed by:
Andrew K
Employee Michael B
Installed by:
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Expert Research:
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Employee Chris R
Video Edited:
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Updated by:
Wilson B
Employee Mike S
Updated by:
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Employee Eric H
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