1. Trailer Hitch Ball
  2. Curt
  3. Trailer Hitch Ball
  4. 2 Inch Diameter Ball
  5. 1 Inch Diameter Shank
  6. Shock Absorbing Ball
Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K

Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K

Item # C40047
lowest price pledge
Retail:$91.44
Our Price: $49.95
You Save: 45%
Trailer Hitch Ball
Orders above $50 qualify for Free Shipping
Shipping Weight: 5 lbs
Quantity: 
In Stock
Trailer Hitch Ball C40047 - 7500 lbs GTW - Curt
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

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. Lowest Prices for the best trailer hitch ball from Curt. Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K part number C40047 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (16)
  • Q & A (13)
  • Photos
  • Used (1)
  • Why etrailer?

Curt Trailer Hitch Ball - C40047

  • Trailer Hitch Ball
  • 2 Inch Diameter Ball
  • 1 Inch Diameter Shank
  • Shock Absorbing Ball
  • Curt
  • 7500 lbs GTW
  • 2-1/8 Inch Shank Length

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 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


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

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.



40047 Curt Rocker Ball with Shock Drop Technology - 2" Trailer Ball - Chrome - 7,500 lbs

Installation Details C40047 Installation instructions


California residents: click here



Customer Reviews

Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K - C40047

Average Customer Rating:  4.4 out of 5 stars   (16 Customer Reviews)

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.

- C40047
by:

Quality looks great won’t be putting on the truck till the snow is gone deliver early thanks etrailer 764662



- C40047
by:

Just put in on today and what a difference it made close to a 3500 lbs boat and trailer if I need to will buy again again and yes again lol quick shipping as well [Thumbs Up] satisfied 762610



- C40047
by:

seemed like a big improvement 899809



- C40047
by:

New hitch and ball for new utility trailer. Appears to be good quality. Can't wait to use. 899690



- C40047
by:

Not sure if i can see any improvement. 898384



- C40047
by:

Excellent selection and service. 830726



- C40047
by:

installed on truck today.pulling boat wed. will let you know .thanks johnny 816112



- C40047
by:

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 786978



- C40047
by:

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 779243



- C40047
by:

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 779242



- C40047
by:

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 763701



- C40047
by:

Just installed will be using November 14 .seams to be well built 725495



- C82KR
by:

Review from a similar RockerBall in Trailer Hitch Ball


It does seem to make a smoother ride. I tow a 20 foot cargo trailer which gets quite heavy at times. 898052



- C82KR
by:

Review from a similar RockerBall in Trailer Hitch Ball


It looks like a quality product, but after buying 3 different drop hitches for my truck it doesn't look like I will ever find one that it will fit on............. so I just bought a stainless ball and went on. Makes for a nice $[XX] paperweight or conversation piece. 865728



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball


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. 820623



- C29FR
by:

Review from a similar RockerBall in Trailer Hitch Ball


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. 808839


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.
-- Heather A - 06/16/2020

81096
16
16

Ask the Experts about this Curt Trailer Hitch Ball

  • Recommended Ball Mounts For Curt RockerBall Shock Absorbing Ball
    I may have an option for you but the Curt RockerBall Shock Absorbing 2" Hitch Ball part # C40047 is a 2" ball with a 1" diameter shank so this will not work for your ball mount with a 5/8" hole. If you would like to switch out your ball mount you can use the RockerBall with a ball mount with a 1" diameter I have attached a couple of ball mounts below that will work with the Rockerball since I am not sure how much rise/drop you need in a ball mount. Draw-Tite Ball Mount for 2" Hitches...
    view full answer...
  • How Tall is Curt Rockerball # C40047 Above Ball Mount Platform
    From 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...
  • Why Cant the Curt RockerBall Shock Absorbing Hitch Ball Be Used With a Weight Distribution System
    The 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 the Curt RockerBall Shock Absorbing Hitch Ball Work With a Weight Distribution System
    The 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...
  • Does The Curt RockerBall Shock Absorbing Hitch Ball Have More Of A Rise Compared To A Standard Ball
    You 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...
  • Does Curt RockerBall Shock Absorbing 2 Inch Hitch Ball Fit Channel Style Adjustable Ball Mount
    Yes, the RockerBall and channel style ball mount you asked about are absolutely compatible: - Curt RockerBall Shock Absorbing 2" Hitch Ball # C40047 - Curt Channel Style Adjustable Ball Mount # C45901 The reason is, the ball mount accepts a hitch ball with a shank that has a 1" diameter and is at least 2-1/8" long, which is exactly the shank dimensions of the RockerBall. I have added links to video reviews of both parts for you to check out as well.
    view full answer...
  • Shock Absorbing Ball Mount With 2-5/16" Ball
    The Curt RockerBall Shock Absorbing part # C40047 only comes in a 2" ball at this time. You may consider using a ball mount like part # AMSC2HD that has a shock absorbing core with a 2-5/16" ball. The ball hole diameter is 1-1/4". If you need a ball with that size diameter shank I recommend part # 19286.
    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...
  • Is a New Ball Mount Needed To Use the Curt RockerBall Shock Absorbing 2" Hitch Ball
    The Curt RockerBall Shock Absorbing 2" Hitch Ball part # C40047 will add 1-1/2" of height to the ball platform so you will then indeed need to get a ball mount that has more drop or can be adjusted to have more drop. I have attached a list of our options below if needed. The MaxxTow Adjustable-Height Ball Mount part # MT70067 is a great adjustable option.
    view full answer...
  • Recommended Hitch Ball and/or Ball Mount for Shock Absorption
    For your ball mount if you have a 1-1/4 inch shank, then the Curt RockerBall Shock Absorbing 2" Hitch Ball - 1" Diameter Shank - Chrome - 7.5K # C40047 or the Curt RockerBall Shock Absorbing 2" Hitch Ball - 3/4" Diameter Shank - Chrome - 3.5K # C94CR is your best option. If you have a 2 inch receiver shank, the above hitch balls are an option, however most other shock absorbing options will have more of a drop than you wanted for ground clearance. For instance the Convert-A-Ball Dual-Cushioned,...
    view full answer...
  • Curt Rockerball C4000047 Pivot Pin Diameter and Cushioning Material
    According to Curt, the # C40047 RockerBall Shock Absorbing 2 inch trailer ball uses a 9/16 diameter tipvot pin. The cushioning material is polyurethane and the ball has a 7500 lb capacity. If you click the provided link, you can see a product demonstration video featuring the # C40047 RockerBall.
    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...
  • Aluminum Ball Mount and Cushioned Hitch Ball for Use with 2021 Kia Telluride
    Two inches of rise would be the ideal amount based on the height differences you mentioned. When you can't get an exact number it's best to go a little taller since there would be some suspension sag from the tongue weight of the trailer. The rise/drop figure of a ball mount like the # DTBM4200 is factored with a standard hitch ball so you would not need to further calculate in a balls height as well unless you went with a taller ball. Now in the case of the Rockerball # C40047 this...
    view full answer...

Do you have a question about this Trailer Hitch Ball?


Used Items Available

Condition: Like New

Notes: May have damaged packaging or minor cosmetic blemishes.

Our Price: $46.96
Secure Checkout


  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer hitch ball for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer hitch ball information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Lindsey S
Installed by:
Jeff D
Installed by:
Randy B
Video Edited:
Jacob T
Updated by:
Sarah W
Updated by:
Noah M
Video by:
Zach D
Written by:
Kristina F

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 800-298-8924