Thru Axle for BOB Trailer: 160 to 172mm with 1.0 Thread

(37 customer reviews)

$ 62.00

Yes! A 12 mm thru-axle adapter for BOB Trailers. These Robert Axles for BOB Trailers are specifically engineered to attach the proven BOB Trailer to your thru-axle equipped bike.

Take full advantage of your modern bike with 12 mm thru-axles and harness the rigidity of the thru-axle to haul your BOB Trailer. Set out on any adventure, big or small. Great for off-road tours, trail building, hauling cargo and more!

  • Compatible with SRAM UDH and Transmission.


In stock

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SKU: BOB113 Category:


Since 2013, we have been an important part of cyclists’ adventures all over the world. Our BOB Trailer thru 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.

Our BOB Trailer 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

Additional information

Weight 0.3125 lbs


A thru-axle adapter for BOB Trailers! These Robert Axles for BOB Trailers are specifically engineered to attach your BOB Trailer to your 12 mm thru-axle equipped bike.

  • This axle is compatible with BOB Trailers.
  • The true length of the axle shaft is 172 mm, but can be shortened using the included spacers – a flat spacer and a tapered X-12 spacer. This allows for axle lengths of 160, 167 or 172 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 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 ends are stainless steel, which allow for mounting of the BOB Trailer bobbins.
  • No special tools required. Design allows for installation or wheel removal using your standard 5mm hex wrench.
  • Please note: This axle does not come with the BOB Trailer bobbins. Those are available separately, here. Or you can reuse your bobbins from the stock BOB Trailer Quick Release that came with your trailer.
  • Designed, built and quality tested in the USA. Proven around the world.


Need more information about how our axles work?

37 reviews for Thru Axle for BOB Trailer: 160 to 172mm with 1.0 Thread

  1. Christoffel Janssens (verified owner)

    I received my axle a week ago and tried it last weekend. It does what it’s ment to do. Keeping the wheel of my Canyon MTB spinning and pulling my BOB trailer. Great! I specially want to mention the excellent service of the Robert Axle Project people since I had some troubles with the delivery due to customs in Belgium. I had some great assistance and proposals to resolve the problem from Chris. Thank you Chris!

  2. fino (verified owner)

    Ordered the Axle for a BOB trailer for my MTB and no problems getting it delivered in the Netherlands. It arrived in a few days with zero grief from customs.
    Perfect fit. Did a test ride the other day and all went good.

    thanks a bunch

  3. Tom Karnuta (verified owner)

    I received my axle in just a matter of a few days. The instructions that came with it and the videos are great and the installation of the axle is simple. Even for someone like me with limited experience working on mt bikes. In addition the website with all the recommendations for pulling your BOB trailer is super helpful.

    I too want to mention the excellent service I received from the folks at Robert Axle Project and highly recommend this product.

    Thanks for taking this project on: Tom

  4. Byron T. from Durango, CO. (verified owner)

    I have a 2016 Specialized FSR Stumpjumper comp full suspension 29″ and bought the BOB. Ibex trailer for Hunting and Packing around town. I bought the trailer off craigs list so when I got home and tried to put it on it didn’t work. I went to the bike store for help and one of the employees said ” You need the ROBERT AXLE PROJECT” We went to their website and found exactly what I needed, Bought it and it arrived quickly, I was so excited. It was so simple to install, took 1 minute. I then went and tried to hook up the trailer and AHHH it didn’t fit. Its an older BOB Ibex so the fork was a 26″ and I then had to order from BOB a 29″ fork. I received the new fork, swapped it out and BOOM! PERFECT!! I was Rocking and Rolling!! It was Amazing how simple the trailer pulls behind the bike up/down rock filled trails even over small downed trees on the trail. The trailer was Loaded with 80lbs of gear and the Robert Axle was Flawless, Super Strong and AWESOME!! I want to also give a shoutout to Chris who was Very Helpful as well. THANK YOU ROBERT AXLE!!!! 🙂 🙂

  5. Keith (verified owner)

    Ordered this for my Specialized Camber. It works great and looks to be a high quality product.

  6. Jeroen Beije

    I received my axle in good order, within two weeks from orderdate despite christmas/new years’!
    The fit is perfect and I took my BOB trailer out for a 3 day winter cycling-camping tour through a nice part of Holland.
    Very satisfied customer and, although the costs are steep, I would advise the products and service by Robert Axle Project to anyone looking for a reliable solution.

    Many thanks for the abilty to enjoy my new gravelracer combined with my old BOB-yak!

  7. Scott R Chamberlain (verified owner)

    Boston Calling. Specialized Turbo X 2015. It took two business days to get my dream come true axle. It fits better then the original and looks great! Thank you for your beautiful quality product. I’m sure you will do well and I will be happy to pass the word.

  8. Jim Roof (verified owner)

    Ordered the axel and had it in a few days. Unscrewed my existing axel and removed it. Screwed in the Robert Project axel, screwed my BOB trailer adapters into each side, and hooked up my trailer. Couldn’t be easier. Have made a few runs with it and all is good. If you need to hook your BOB trailer up to a Mt. Bike, this is the way to go.

  9. Ralph Howey (verified owner)

    I have a specific trail in mind this summer and it’s rough enough to justify a NEW STUMPJUMPER, wahoo! But my BoB had to come and The
    Robert Axle Project had the solution. Easy peasy. Thanks Bend, you made it all possible.

  10. Steve Christian (verified owner)

    I have been pulling BoB with a bike with a quick release. This Robert Axle Project makes my new bike BoB compatible.

  11. Andrea

    Supreme quality and smooth installation on the bike!! I love these axle! 🙂

  12. Andy (verified owner)

    The axle worked as promised. Great product, great instructions and delivered on time.

  13. Anthony Davidson (verified owner)

    Got a Lynskey MT29 half price on CRC. Didn’t come with axle; some Googling turned up this mob, & the price was not much more than any other axle. So I went straight to this one. The numbers seemed near enough, & one of the included spacers made it perfect. My 29er Bob fork just got here, so my new bike is ready for an extended rumble! Thank you Robert, whoever you are, whatever your name really is, for letting us use our old Bobs with our new bikes. Legend!

  14. Hans (verified owner)

    After years of having a “new” bike and without using the “Bobby” trailer, I finally found this perfect product.
    Fits the bike and the trailer after using the “Thru Axle Finder” without any issues.
    First test ride was successful, looking forward now for many other long term trips carrying outdoor gear in the trailer.

  15. Dave Yaeger (verified owner)

    Quality specialty product at a reasonable cost. Order was promptly filled and shipped. Followup very much appreciatef

  16. Alex (verified owner)

    Got this for my 2019 Specialized Stumpy to pull a BOB for trail work. Fits perfectly and easy to install thanks to simple but detailed instructions. Quality seems top notch.

  17. Kes Roberts (verified owner)

    I was so happy to find this so that I could put my old Yak back into service with a new Cannodale Topstone. It works great and I’m very happy. This is a great and innovative product.

  18. Steffen (verified owner)

    Outstanding service.
    I thorroughly recommend going through The Robert Axle Projekt directly and not through 3rd party vendors. The reason for that is that TRAP have a foolproof matching algorithm to find the right product for you. Also, I had my axle delivered in less than a week to Germany (in the middle of the Covid mess). Big thumbs up!
    The product is really well maufactured.
    One star deduction because one of the threads is a bit blocked… probably have to clean it or re-cut it… no problem, though.

  19. David Roberts (verified owner)

    Works like a charm. Perfect fit and quick shipping to Canada. Thanks! One thing to note for buyers (in case they don’t read carefully): this is JUST the thru-axle and does NOT include the hitch bobbins (so bobbins need to be purchase separately or pillaged from the QR included with your trailer).

  20. KW (verified owner)

    The Thru Axle for BOB Trailer: 160 to 172mm with 1.0 Thread that I ordered worked perfectly for my Rossignol e-bike & Bob trailer. It was easy to use the guide on which size/model to order and arrived quickly. I’ve used it with the Bob trailer several times to haul trail tools up single track/rough terrain and has held up without any problems.

  21. Gabriel (verified owner)

    Easy to set up (don’t forget the spindles!). Lightweight for what it is, and well machined. Very happy with the hardware.

    You will need the correct size trailer fork to allow wheel/tire clearance, and you will need to bend your fork to fit wider axles…this is not hard to do but keep it in mind. I ended up buying a second trailer for use with my Hightower because I use my stock size trailer for other bikes. Net net, don’t plan on having one trailer to swap between your garage of bikes (n+1).

  22. Hans (verified owner)

    I received my axle within a week in good order.
    Unfortunately one of the RAP Bobbins I ordered already along, didn’t fit in the axle.
    After some work I managed to adjust the screw so it fitted.

  23. Peter Tukker, Netherlands/EU (verified owner)

    Ordered sets of Bob Yak Axles + Bobbins for an MTB / Enduro – friend. Within 5 days from ordering in US, the parts arrived at my home in Rotterdam Netherlands. Great service and ….. We Will Be Back For More, For Sure !!

    Thanks again for your great services and feedback/Q’s during the ordering process, as I entered the wrong number of B Y Bobbins while ordering…

    (Read this: I ordered special bike tools in UK early FEB, which arrived 3 weeks later)…..

  24. Bill Freeman (verified owner)

    Ordered axle on Sunday and received on Friday, 15 minutes before we were to leave on our bike trip. Luckily, the ordering process was spot on and the parts I received were exactly what I needed and fit perfectly.

    Product performed flawlessly and the ordering process could not have been simpler. (once I figured out to print the templates in ‘Actual Size’).

  25. Andrew Drouin (verified owner)

    What a beauty piece of work! Ordered an axle for my eBike-to-Bob-Trailer from these folks. It shipped crazy-fast (to Canada), fit perfectly and the machining was absolutely top-notch. The unit also shipped with all manner of extra parts, to allow a fit under all circumstances.

    Nice work ‘Robert’

  26. Jonathan (verified owner)

    Fitted a 2019 Stromer ST1x perfectly. Just make sure to match washers to correctly fit fork width as described in instructions.

  27. Maximilian

    Back in 2020 I was a proud owner of a Marin Gestalt X11 gravel bike for which I had ordered the corresponding kid trailer axle. It worked like a charme.
    So I knew I could expect a high quality and great looking product when I bought that Bob trailer axle. This time around it’s for a Ritchey Swiss Cross frame and the reason I chose this axle was not only the thule kid trailer which I still use, but also my idea to mount a rack on this bike that has no mounting points for racks. It turned out, that after two hours of fiddling around bending and drilling Tubus rack adaptors I succeeded: I can now mount the rack and also the hitch for the trailer. 🙂
    It’s a pity shipping to Germany is almost 20 $ and furthermore I had to pay 10 $ customs… But that’s not Robert axle’s fault.
    I can send pictures if anyone likes…

  28. Russ (verified owner)

    I found a used Bob high Ibex trailer and needed to retrofit it to fit my 29 inch mountain bike. I bought a through axle and a larger fork to fit the 29 inch wheel. The parts were sent very promptly and the customer service was outstanding. I was able to get everything in time to go on a bike-packing trip at Arches national Monument. This is one company that actually cares about its customers. Russ D

  29. Matt

    Thanks to Robert my BobYak lives on.

  30. Gary Denhart

    Wow! I was quickly disheartened when after purchasing a new bike that my trailer company didn’t sell a thru axle. Thanks to to Robert I don’t have to sell my Yak trailer and can tour on! Quite frankly I think the quality of the thru axle is better than the quick release that came with the trailer.

  31. Edmond (verified owner)

    Absolutely top service with an extremly fast delivery! The right axel was easy to find, to order and to pay. Friday afternoon ordered and delivered on Thursday morning in the Netherlands! Last week we used the axel and was juist perfect with the Bob Yak.

  32. Jonathan (verified owner)

    Axe acheté pour mon canyon grizl afin de pouvoir y adapter ma remorque Bob yak ! C’est au top, montage facile et rapide, qualité visiblement au rendez-vous !
    Le sav Rober axle est génial, j’avais une question ils ont répondu en quelques heures, bravo.
    Bravo et merci

  33. Bob A (verified owner)

    I have a BobYak that I have traditionally used with my Surly Ogre attaching it with a traditional Bob Quick Release skewer. With the Robert Axel Project thru axle I can use my Bob on my Specialized Stumpjumper Mtn Bike. I recently did a trip with my daughter and using the different sized washers that come with the axle, we were able to swap the trailer between our bikes daily. She rides a Canyon Spectral for reference. Fantastic product and very easy to set up at home and swap on the trail.

  34. April Carr (verified owner)

    5 stars!! I purchased the Thru Axle for a BOB trailer. I soon realized I also needed the Robert Axle bobbins too (as the stock trailer boppers were not compatible) and placed another online order. Robert Axle recognized the connection of parts and expedited the Bobbins at their expense. I was so surprised to have received them even faster than expected! Thanks to Robert Axle’s products, the new singletrack BOB trailer fits my Turbo Levo and the pup and I can go anywhere.

  35. Andreas Habel (verified owner)

    Delivery from Oregon to Stavanger/Norway took only 3 days – amazing! The Thru Axle fits perfectly, so that we are able to use our Bob Ibex on our newly puchased tandem bike.

  36. Andreas Habel (verified owner)

    Only four days after I ordered the axle it arrived in Stavanger/Norway and it fits perfectly. Now we are able to use our BOB Ibex together with our new tandem bicycle.

  37. Chuck (verified owner)

    perfect fit in my stumpjumper, was able to take my Bakcou cargo trailer hauling all my gear with nothing on my back …what a relief !

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