Thru Axle for BOB Trailer: 174 to 180mm with 1.75 Thread

(17 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!

In stock

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SKU: BOB111 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 180 mm but can be shortened using the included spacer to 174 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 12×148 hub does not equal a 148 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 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?

17 reviews for Thru Axle for BOB Trailer: 174 to 180mm with 1.75 Thread

  1. Jim (verified owner)

    Great company to work with and the axle fix my Salsa hub perfectly. I needed to reform my BOB trailer yoke and their video was very helpful on how to do this. I also purchased their trailer pins and bobbins which were a perfect fit.

  2. Lee Brown (verified owner)

    Received my axle in short order. Installed it quickly (with some help) and hooked up my BOB Yak and tried it out, worked great. Look forward to taking it out on the trail. Excellent service!

  3. Heidi Conway (verified owner)

    this thing saved me! Who knew it would be so complicated to attach my old BOB to my new bike!!?? Of course, I didn’t realized until just before our family bike outing that I needed a fix and it was unavailable in my town (several of the bike shops are now carrying Robert Axle Project pieces, just not the right one.) Thanks to my local Trek store for sending me to the Robert Axle Project, and thanks to the Robert Axle Project for sending it so efficiently. I had to reef on the yoke to make it work, but it DID work. maybe now I’ll look at the video referenced in the other review to see how to do it correctly:) Thanks again for the service, Robert Axle Project!!!

  4. Don (verified owner)

    FANTASTIC Customer Service
    FANTASTIC products
    FANTASTIC Company
    Super easy to install and bulletproof construction

  5. Pat Murphy (verified owner)

    The axle fit perfectly on my bike, and works just like the old skewer setups. I used the bobbins from my old skewers and they worked perfectly. The ‘how to’ videos on the site were very helpful in getting the axle set up and the yoke on my BOB resized to fit the wider axel on the new bike. The shipment arrived in must a few days so excellent customer response time so far. I’m glad someone is making axels for BOB trailers that work with thru axel systems. So far I think this is a great product, clean simple and good quality.

  6. yvan Dumas (verified owner)

    Fit perfectly with my TREK 920. Fast service. Very satisfied.

  7. Jean-Pierre (verified owner)

    I have received the order and I am extremely pleased with the service and the axle.
    Thank you very much,

  8. Adam Richman (verified owner)

    I used this axle to attach a Blackburn rack to a Salsa Deadwood. I received quick and thorough follow up on questions about what is supplied and why, mostly because the kit is mostly intended for BOB trailers. Works great. It is actually much better designed and made than the rack itself. The rack is highly adjustable, which I applaud, but the hardware is cheap and the rack itself is pretty flexy. So the news that RAP is taking over (?) OMM racks is I think a very smart move…


    Works great with a Trek Stache!

  10. Delmar Voegele II (verified owner)

    This is my third axle from Robert Axle Project. It was just like all the other deals I’ve done with them. Everything was just as good as the past axles I’ve gotten. My new bike was a little out of the usual for what is made for axles for the Bob trailer set up. My new bike has a through axle but unlike most bikes where the axle threads into the swing arm, mine uses an axle nut. So I made one that works perfect with my new axle. Now I can tow my trailer with confidence. Thanks guys for another great axle. I’m sure there will be more to come. But I am getting a collection going now. LOL.

  11. Delmar Voegele II (verified owner)

    Great working with you guys again. This is my third Axle from you over the years. As bikes change, axles change. This last one was a little different then any other. My new bike uses a 12mm axle in the rear, but unlike most bikes out there my axle doesn’t thread into the swing arm. It actually goes through and uses an axle nut. That created a small problem with making my drive side bobbin stick way out and leave my trailer off set from center. But I was able to make what I needed and made an axle nut that had the bobbin pin on it and I was able to bring the bobbin back closer to the frame. It now works great and I am again a happy camper. I suppose one day this one will also be in my Roberts Axle collection I am building as I need new axles for my new bikes. LOL

  12. Mike Wiederich (verified owner)

    Fits like a glove. Don’t forget you have to also order the RAP BOBBINS. One loses the quick release capability. An old Phillips head screwdriver with a 6mm shaft works. Didn’t have room in my tool pouch, so I connected to the bike frame. If you don’t have some of your farmer grandpa’s baling wire, duct tape works.

  13. Ed Cottell (verified owner)

    Very happy with the service and speed of delivery. I forgot to order washers for the axle and had to order them separately. The spacers were about $1.00 each but the delivery was around $6.00. I needed them so decided to order them. The next day, I received an e-mail telling me that the washers were being sent with my axle so no charge for shipping. I was very pleased with the attention to detail that the company has. Thanks again, Ed Cottell

  14. Jon Mireles (verified owner)

    A little pricey, but the fit was spot on. Great quality product. Highly recommend.

  15. Brian (verified owner)

    Worked perfectly. Highly recommended.

  16. Dan Westbrook (verified owner)

    What a great product and excellent customer service! The quality and craftsmanship are excellent and it works perfectly. Have a little over a hundred miles of just straight riding and several days of towing my trailer for trail work and zero issues.
    Keep up the great work and making a great product that is needed!

  17. Calvin Young (verified owner)

    I am so happy to know that companies like this still exist. A bespoke product for a small market. And they just happen to be from my hometown! Thanks for what you guys do! The axel fits perfectly and pulls the trailer like a champ. (The dropouts on the trailer get reeeeeaaally close to my derailleur hanger, though.. careful with that.)

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