12mm Thru Axle for Kid Trailer

(12 customer reviews)

$ 61.00

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.


This product is discontinued and has been replaced with KID226(link) 

Out of stock

SKU: KID216 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.

Prop65 Warning icon

WARNING: This product can expose you to chemicals including nickel acetate, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Additional information

Weight 0.3125 lbs


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 181 mm, but can be shortened using two included 6 mm spacers, for lengths of 169 or 175 mm also.  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 142mm long axle.
  • This axle has a 1.0 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?

12 reviews for 12mm Thru Axle for Kid Trailer

  1. Luc (verified owner)

    I would like to thank you for your professional international services.
    I received the axle and it fits perfect with my eMTB

  2. Markus (verified owner)

    Fitting on the Scott E-Genius 710 Plus (2017) // perfect support by Chris (co-founder) // quick shipping to Germany //
    Thanks a lot!

  3. Nico

    The axle also attached to a Scott E-Genius 710 plus. Fits almost perfectly.
    So that the axis ends flush with the inner thread, it should only be 2-3 mm longer;
    quick shipping to Germany

  4. James (verified owner)

    Solid product and even better customer service and knowledge.

  5. Peter F (verified owner)

    Purchased the axle for my Scott E-Genius and received it only 4! days later in Germany!!!
    Works perfect to connect the Thule trailer, great product and a perfect service!!!
    Thanks 🙂

  6. Scott


    Thank you! The axle fits. You guys rock

  7. Terry Brugger (verified owner)

    Just bought a Tern GSD, which is an amazing bike, particularly with the additional cargo capacity over a standard bike, but with three kids, we still need our Burley D’Lite sometimes. The GSD is my first bike with a through axle, and while I love how rugged and still easy to use the through axles are, hooking up the Burley was not going to happen without the Robert Axle Project. As wonderful as the Tern is, the documentation is… not as great — so the sizing chart was a life saver — I was so relieved when I could see with confidence that I was ordering the right axle. When it arrived I was impressed with how carefully machined it was, and much heavier than the stock axle (which was no lightweight to start with). Installation was a breeze, and riding the GSD while pulling the trailer is a thrilling experience. If you have a thru-axle and have or are thinking about a trailer, this is the only way to go! The only possible way they could improve it is to have a pitlock (or similar) option.

  8. Mark (verified owner)

    Got this to pull a Thule Chariot double on Tern GSD s10. The fit and finish on this axel second to none. I’ve been riding fully loaded for a month and everything is as tight as the day 1. The compatibility with hexlox puts it over top. Great axel and great service.

  9. Robert (verified owner)

    Bought two for Tern’s GSD S10, axles fit perfectly and the Robert’s AP customer service was tops. Great product and good support, can’t ask for more than that.

  10. Scott Fitinghoff (verified owner)

    I installed this on my Tern GSD to two a burley trailer. Instructions were very clear and install went easy. They RobertAxle replacement is much stronger than the stock axle. The Tern GSD is a very good bike and the RobertAxle is a great enhancement.

  11. Leif Mats Eide (verified owner)

    Smooth pick and ordering process, quick delivery to Norway. I loved the extra thought of non-plastic padding in the envelope delivered as well.

  12. Jourdan (verified owner)

    Envoie rapide et produit bien protégé.
    Je suis très content de cet achat !!

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