Quick Release Hitch Adapter for Trailers

(15 customer reviews)

$ 25.00

Robert Axle QR Adapters for Kid Trailers and Cargo Trailers are designed specifically to fit your 5mm quick release bike and allow attachment of any hitch-mounted trailer. These QR Hitch Adapters fit any trailer that has two wheels and a single point of attachment to the axle. This includes all the two-wheeled child, pet and cargo trailers such as: Thule, Chariot, Burley, Instep, Carry Freedom, and many more.

If your bike has a 12mm thru axle we make thru axle adapters that you can find by using our Axle Finder here.

Purchase our QR Hitch Adapter for your bike. Share your stoke for cycling with your kids. Simplify your life by allowing quick and secure attachment of your trailer to your best and favorite bike. Enjoy the adventure.

In stock

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SKU: ADA001 Category: Tags: , ,


The Robert Axle Project Quick Release Hitch Adapter is for bikes with 5mm quick release rear axles. Our hitch adapter for towing kid trailers and single-arm bike trailers is high quality and precisely machined. This includes all the two-wheeled child, pet and cargo trailers such as: Thule, Chariot, Burley, Instep, Carry Freedom, and many more.

Our hitch adapter is made of stainless steel and is incredibly durable.  It’s built to handle towing a fully loaded bike trailer. The Robert Axle Project Quick Release Hitch Adapter helps trailer hitches fit more bikes. It easily clears hooded dropouts and other interfering dropouts. It is easy to install. Simply flip the quick release, replace the QR nut, and attach the hitch that came with your trailer.

Our hitch adapter uses a 5 mm hex to attach your hitch and precious cargo more securely than with other knurled adapters. When installing the hitch, the 5 mm hex isolates and protects dropouts from marring and over-tightening of the quick release.

If your bike has a 12mm thru axle we make thru axle adapters that you can find by using our Axle Finder here.

At Robert Axle Project we believe in enhancing the role of bikes in your life’s adventures. Expanding our immensely thorough catalog of thru axles for trailers, racks, trainers, and more, helps us do that.

Additional information

Weight 0.3125 lbs


Robert Axle for Kid Trailers replaces your stock quick release nut so you can attach a child or cargo trailer to your 12 mm thru axle equipped bike.

  • This axle is compatible with Burley, Carry Freedom, Chariot/Thule, Croozer, Instep, and many more hitch style trailers.
  • The adapter is compatible with 5mm quick release skewers.
  • The QR hitch adapter is precision CNC machined.
  • The QR hitch adapter is stainless steel.
  • The threads for mounting the hitch provided with your trailer are M10x1 (metric).
  • Hardware for attachment of the hitch is included; the hitch is not.
  • No special tools required. Design allows for installation or wheel removal using your standard 5mm hex wrench.
  • Designed, built and quality tested in the USA. Proven around the world.


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15 reviews for Quick Release Hitch Adapter for Trailers

  1. Eman (verified owner)

    Easy installation and works great on Trek E-Bike pulling my son in his Burley Bee. Thanks again!

  2. Cody (verified owner)

    I originally tried to make one of the major kid trailer manufactures’ hitch adapter work, and I did, but it was a pain. When tightening the other adapter down, it was very difficult/impossible to not have it rotate out of position during the final tightening.
    The Robert Axle Project’s hitch adapter solves this problem by including a hex slot to be able to brace the adapter as a counter force for the final tightening preventing the hitch from rotating out of position. Thoughtful design feature that makes this adapter superior.

  3. Jessica

    Just what I needed to get my trailer safely on my bike.

  4. Don (verified owner)

    Works great for my fat bike QR pulling a chariot. Shipping was simple.

  5. Dennis (verified owner)

    I have hooded dropouts on my bike which require the use of a quick release adapter to mount my kid trailer.

    I had originally purchased and used the Burley adapter but was frustrated with its design. In order for you to torque the nut, you have to finger grip the knurled adapter body. Unless you have incredible grip strength, it was very difficult for me to keep the adapter from rotating while torquing the nut.

    The Robert Axle Project adapter solves this problem by allowing you to use a hex wrench to hold the adapter body in place. This makes it far easier to properly torque the nut. Their version also includes a washer and uses a nylon lock nut which should resist loosening and is therefore safer.

  6. Lindsay (verified owner)

    Exactly what I needed to attach a Thule Chariot to my Marin Terra Linda. The Thule adapter for hooded dropouts did not fit, and trying to figure out how to attach the trailer safely was becoming quite frustrating. The Robert Axle Project’s customer service person was quick and helpful in solving my problem and directing me to the right product. I was very impressed and pleased.

  7. Davy


  8. Johnathan Zandonatti (verified owner)

    Works perfect for us. Fits the Thule Chariot cougar 2 coupler. We have two Raleigh bikes, class 1 electric, non electric, both with five mm quick release skewers. The threaded attachment fits perfectly. Just flip the skewer hook up and go!

  9. Jacob Newkirk (verified owner)

    Works perfect for our needs! The part shipped very fast and was easy to install. Use it to attach the kid trailer coupler to a Trek Marlin. Trailer hookup is now fast and simple and we are loving it. I ended up ordering a 2nd one for my wife’s bike.

  10. Richard (verified owner)

    STOP looking anywhere else!!!

    Order from Robert Axle Company without hesitation.

    After making the mistake of trying a different brand, I am now a “Happy Convert”. The first adapter I tried was cast from a much weaker material, did not come with a proper lock-washer/nylon locking nut, and was NOT robust enough to even allow the use of a simple split washer to lock the adapter on. The threads just flaked apart. Not cross threaded as they tried to claim, just gave up as soon as a little tension was applied. Thankfully I had pictures to send them. To their credit, they did send the refund immediately upon my sending them pictures.

  11. Danny (verified owner)

    Worked perfectly for adapting a Schwinn Shuttle trailer to my Specialized hybrid. Very thankful for this product so that my son can come on rides with me.

  12. Patrick (verified owner)

    Ordering, shipping, and assembly were all quick and easy. I’m a heavy equipment mechanic by trade and can tell all components are well made. My adapter was for a 5mm QD axle on my wife’s Cannondale for a two seat trailer. After 12 or so trips everything still works like new.

  13. Kyle (verified owner)

    The adapter worked great for connecting a trailer, however the instructions did not match the kit itself. The instructions referred to a few different washers included in the kit, however the kit only had one washer. It also mentioned to hold the spacer in place with a 17mm wrench, however the spacer is completely smooth and there is nowhere to hold it in place with a wrench. Instead, it requires an allen key hold in place. If the instructions were correct, this would be 5 stars.

  14. Walter-Joseph Grabowski

    I recently purchased (2x) 5mm Quick Release Hitch Adapters for our RetroSpec Rover Hauler single-arm bike trailer. Our bikes have PinHead Lock 5mm QR axles, and everything worked perfectly together! I added a stainless steel sleeve washer to eliminate the slack between the RAP M10x1 adapter axle and the bike trailer mount. So far the performance is simply fantastic! Thank you so much for making awesome products!!

  15. Ali (verified owner)

    Fits Trek Roscoe 8 perfectly to tow my Retrospec pet trailer.

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