CURT® 21100 - Adapter Bushing (Reduces 1" to 3/4")

10 reviews|Item # mpn1087940
Universal Fit
Fitment notes:
  • Not Vehicle Specific
Authorized Dealer
$2.09
$2.20Save $0.11 (5%)
In Stock (3217) - Ships in 24 to 48 hrs
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Vehicle Fitment

This part is universal

Features

Precisely welded for a perfect fit and function
Precisely welded for a perfect fit and function

CURT hitches are welded using manual and robotic processes for speed and precision.

Protected by an industry-leading, dual-coat finish - inside and out
Protected by an industry-leading, dual-coat finish - inside and out

Every CURT hitch undergoes an industry-leading co-cured finishing process to ensure maximum protection against UV rays, rust, scratches and chipping.

Comes with a limited lifetime warranty (one-year finish, one-year parts)
Comes with a limited lifetime warranty (one-year finish, one-year parts)

CURT products are backed by a limited lifetime warranty coverage against defects in factory workmanship and materials and a one-year warranty on finish and parts.

Engineered, fabricated, and welded in the USA
Engineered, fabricated, and welded in the USA

All CURT custom trailer hitches are made in the USA. This means each hitch is engineered, fabricated, welded, finished, tested, and finally shipped out from their headquarters in Eau Claire, Wisconsin.

  • CURT Special Offers

Product Details

Universal Adapter Bushing (21100) by CURT®. Allows 3/4" trailer ball shank to fit 1" hole. Finish: Yellow zinc. With so many different trailer ball and ball mount sizes available, it is a possibility for a trailer ball and ball mount to be mismatched. Though we pride ourselves on offering a complete selection of towing equipment and design our products to be an exact fit for your towing application, we understand that making a minor adjustment to your towing equipment is much more cost-effective than purchasing brand new equipment. CURT reducer bushings are the fast, easy way to make your trailer ball fit snugly into your ball mount for safe, quiet towing. Installing a trailer ball with any wiggle room between the shank and ball mount hole is a recipe for disaster.

It does not matter how much torque you apply to the trailer ball nut; if you have a trailer ball shank that is too small, it will eventually come loose in the ball mount platform and lead to trailer sway and even a breakaway. A CURT reducer bushing provides an effective filler for any gap that might surround your trailer ball shank. CURT reducer bushings come in three sizes to fit most standard trailer ball and ball mount sizes. All CURT reducer bushings come with a yellow zinc finish to prevent rust and corrosion.

CURT® - FAQCURT® - CatalogsMade In USACURT Authorized Dealer
Brand:
CURT
Part Number:
21100
UPC:
612314601004

Reviews

(10)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-10 of 10 Reviews
5 of 5
Great Lock Set
I feel safe with this on my hitch! Quick and easy to use!
Posted by Justin (Bovina, TX) / August 31, 2024
5 of 5
Bike Rack Signals
I have a hitch-mounted bike rack that blocks my signals. These auxiliary lights the perfect solution to make my rig a lot safer on the road. If I find a brighter set I'd replace these. But for now, these are the best on the market. Plug for Curt. The first set arrived broken and Curt sent the replacement ASAP without asking for a return.
Posted by Ken (Sierra Vista, AZ) / October 02, 2020
5 of 5
Great for Hitch Basket
These worked perfect on my hitch basket. I wired them neatly with a few zip ties underneath, and some plastic wire harness covers. (Hint: Just make sure you look at which one is left vs right before you stick them on).
Posted by Customer / July 19, 2020
5 of 5
Good
Easy install.
Posted by Jeff (Bennington, NE) / November 12, 2014
5 of 5
Beautiful
Just as pictured. Tough to find color. High quality!
Posted by Ben (Portland, OR) / December 31, 2012
5 of 5
Great Product
Works great a little pricey for a hitch but made very well.
Posted by Rickey (Boonville, NC) / November 01, 2017
5 of 5
Great Lock
Got this set for my new Curt 45902 ball mount which is the for the 2.5 inch receiver. Works awesome. To keep the locks from sliding side to side I added a couple water hose gaskets on both ends. So if you're wondering if these will fit your 2.5 inch receivers, they will with space to add gaskets. Great product to keep people honest and not take your ball mount or your balls.
Posted by Chris J. (Pacifica, CA) / March 25, 2017
5 of 5
Curt Anti Rattle (Very Good Quality)
The picture is different from the actual product, but works just as good or better. The product is high quality. I had to return the product because it would not fit on my 2013 Toyota Tacoma. The bolt is too short because of how the hitch receiver is made on the Tacoma.
Posted by Tyrel (Mccleary, WA) / July 07, 2015
5 of 5
Hitch Receiver
Good product.
CURT® 21551 - 5/8" Chrome Integral Pin & Clip for 2", 2-5/16" Receivers
Posted by Ayomade (Nashville, OH) / January 11, 20142012 Audi Q7
5 of 5
Good Fit
Looks good and does a good job.
CURT® 21500 - 5/8" Zinc Hitch Pin & Clip for 2", 2-5/16" Receivers
Posted by Jacob (Brandon, SD) / September 04, 20132012 Porsche Cayenne

Questions and Answers

(0)
If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!