CURT Switch Ball Set 1-7/8 and 2 inch Trailer Balls (42178) – Interchangeable Heads, 3,500/6,000 lbs
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Description
xOverview
The CURT Switch Ball trailer ball set combines simple elegance with rugged towing performance. Built around a single shank and a removable ball head, this system lets you adapt to different coupler sizes without juggling multiple mounts.
Thanks to an exclusive J-groove design, you can swap ball heads by twisting and lifting—no tools, pins, or extra parts required. The result is a streamlined solution that keeps your toolbox organized while delivering dependable towing support for light- and medium-duty trailers.
Key benefits and specs
- Fits 1-7/8" or 2" couplers with a maximum capacity that depends on the chosen head (up to 6,000 lbs GTW).
- Includes two ball attachments: 1-7/8" diameter (3,500 lbs GTW) and 2" diameter (6,000 lbs GTW).
- No extra ball mount, coins, or pins needed to switch heads—just twist, lift, and swap.
- J-groove design delivers a secure hold while allowing easy removal when needed.
- Shank bears the weight to minimize friction and reduce binding on the coupler.
- Constructed from high-strength steel with a bright nickel-chrome finish for durability and corrosion resistance.
- Independently tested to SAE J684 standards for reliability and safety on the road.
How it works
To switch between heads, twist the Switch Ball head, lift it off, and twist another head into place. The combination of the shank and J-groove ensures a solid connection while enabling tool-free changes in the field.
What you get and specs
- Shank length: 2-1/4"; Shank diameter: 1"
- Two interchangeable heads: 1-7/8" and 2" balls
- Material: high-strength steel with a bright nickel-chrome finish
Real-world use cases
Ideal for campers, small-and medium-duty trailers, or work trailers where varying coupler sizes are encountered. This set helps reduce clutter and simplifies transitions between trailers without needing multiple ball mounts.
While it’s designed for reliability, users should always select the head that matches their specific coupler rating and towing needs for best performance.
FAQ
Q: What is the CURT Switch Ball Set 42178?
A: A two-head trailer ball kit with interchangeable heads on a single shank, for multiple couplers.
Q: How does the J-groove design help with towing?
A: It holds the ball securely on the shank and lets you swap heads quickly without tools.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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