12mm Thru Axle for Kid Trailer

(5 customer reviews)

$ 58.00

Robert Axles for Kid Trailers are designed specifically to fit your 12mm thru-axle bike and allow attachment of any hitch-mounted trailer. These 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.

Purchase our Kid Trailer axle 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.

SKU: KID210 Category:


Since 2013, we have been an important part of cyclists’ adventures all over the world. Our axles have millions of miles on them in mountain bikes and road bikes, carbon bikes, fat bikes and e-bikes. Our axles are specifically designed to handle the high-torque loads generated by e-bikes.

Your stock thru-axle is not strong enough to haul your precious cargo! Our axles are 3 to 4 times stronger than the stock axle that came with your bike. Our stainless steel axle ends provide a safe and secure attachment point of the hitch to the axle. The axle is quick to install and remove with a common 5mm hex key.

Our axles are not just designed in the USA, but are made here as well. They are machined by avid cyclists to the tightest standards in the industry. We safety test, to failure, every batch of axles we produce to ensure they exceed your expectations.



Robert Axle for Kid Trailers replaces your stock thru-axle 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 true length of the axle shaft is 198 mm, but can be shorted using the included 6 mm spacer. This allows for axle lengths of 192 mm or 198 mm. Please note: Thru-axle lengths do not equal hub standards. An axle has to be longer than the hub to fit in the frame. A 12×142 hub does not equal a 142 mm long axle.
  • This axle has a 1.75 mm thread pitch.
  • The axle shaft and axle end are precision CNC machined.
  • The axle shaft is 7075 aluminum and hard black anodized for rugged durability.
  • The axle end is stainless steel, which allow for mounting of the hitch provided with your trailer. The threads 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.


Need more information about how our axles work?

5 reviews

  1. Jeremy (verified owner)

    This axle opened up awesome opportunities for our family. I am using it with a Trek Fuel full suspension and a Burley Tail Wagon for our two little pups. My young kids get a kick out of being able to take the dogs when we ride. Ordering online was a breeze thanks to the figment guide, the axle arrived sooner than expected, and I am impressed with the quality. Installing was simple and it hasn’t budged over the first forty miles of use. Great company with great products that solve problems and open doors for those with a two wheeled lifestyle!

  2. Jonathan (verified owner)

    This is my second thru axle (one for my fat bike and one for my fuel ex) from Robert axle project and both have been incredible. They are very strong and pull a double burley with two 40 lb children without a problem. I often forget to remove it and ride enduro trails with my burley adapter still attached. Easy to install and remove.

  3. Kathy Hatcher (verified owner)

    The product went on my bike without a problem and I was able to hook-up my trailer right away! This product is awesome.
    And the team behind the product is very good as well.

  4. Christopher Slade (verified owner)

    Absolutely no complaints about this. Got sick and tired of trying to “make it work” on my 2015 Trek Remedy when riding around and wanting to tow the little guy in the trailer. The Remedy is not designed for trailer towing, but this axle works beautifully with the Trek APB swingarm setup and no longer do I need to worry about damaging the pivot mechanism, or just fighting to mount a trailer.

    Highly recommend this product for anyone looking to EASILY make their high performance racing/enduro rig be able to slow down with the family!

  5. Murray (verified owner)

    As advertised! The Axle Finder worked great for my Trek Remedy. Our Devinci Troy is not currently in the Axle Finder but there is a good explanation for how to interpret the numbers stamped on the axle. After ordering they arrived in good time and the quality is high. We are looking forward to our bike-packing trip.

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All orders from our website are via US Postal Service, from Oregon, U.S.A. We make every effort to ship your order within one business day.

Shipping rates and average delivery times are:

• United States: $7.50 USD, 3-4 business days

• Canada: $12.50 USD, 10-14 business days

• All other International: $12.50 USD, 12-16 business days

We are unable to offer expedited shipping. If you need expedited shipping of our products, please visit our Dealers & Distributors page for options. We cannot take responsibility for any delays during shipping, including delays in customs or incorrect shipping information.

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