Yes. Every new Robert Axle comes with a limited warranty issued to the original owner. Please see our Warranty & Returns page for the full warranty information.

Yes, we can ship to any country. Visit our Shipping Page for more information. We also have a list of distributors around the world on our Dealers & Distributors page.

Shipping rates are shown in the Shopping Cart, once you add your first product. Our shipping rates are flat rate. You can combine your order with friends to save on shipping.

We are not able to expedite shipping at this time. If you need your axle tomorrow, please visit our Dealers & Distributors page to see if you can order directly from them.


Yes, yes, and yes. In fact Specialized is one of the more popular brands out there, and we fit all of their bikes – road, mountain, electric, gravel – you name it. Please just use the Fitment Selector found on each page and you’ll be directed to the axle that you need. And yes, we fit Burley Trailers as well.

In all cases, an electric version of a bike has the same thru axle as the pedal only version. Any mountain bike will have the same exact axle whether it’s the electric bike version or the pedal bike version. If you are unsure how to classify your e-bike (perhaps it is a hybrid of sorts), then you will need to follow our instructions on the What Axle Do I Need page. If you contact us about a bike that isn’t in the Fitment Selector it’s because we haven’t seen that bike yet – we will ask you to follow the directions on the What Axle Do I Need page.

Yep, we can help. In fact, many folks come to us looking to replace those proprietary axles. Use our Fitment Selector to find what you need.

With most bikes you cannot convert to a thru axle because the frame will not allow it. However, Trek’s “Closed Convert Dropouts” are one example of a manufacturer that has designed their frames to be convertible. Check with your bike manufacturer.


We have a handy blog post that we put together that helps you determine whether you have a thru axle or not. Check it out!

We’ve developed a custom Fitment Selector found on most pages. Please use this first to determine if your bike and application is in our database – there is a 99% chance that it is! If you don’t see your bike in the Fitment Selector, then you’ll need to follow the directions on the What Axle Do I Need pageIf you contact us because you don’t see your bike in the Fitment Selector, then that is because we haven’t seen it either – and we’ll ask for your help and ask you to follow the directions on the What Axle Do I Need page. 

No, we do not make any 10mm thru-bolts. Nor do we make any 10mm thru axles. We only make 12mm and 15mm thru axles.

Yes, we certainly want you to support your local bike shop. In the U.S., we work with bike distributor, Quality Bicycle Products (QBP) to get Robert Axles into bike shops. Check with your shop to see if they can order through QBP. In other countries, we work with distributors and dealers. Check our Dealer & Distributor page for more information.

Before installing the axle, lightly grease the axle and threads. Be sure to check your torque setting before every ride. We recommend that you not use your Robert Axle without a trailer or accessory as the axle does stick out a little more than you stock axle (except for the Bolt-On Axles)


Please read the instructions and warranty of the trailer that you own to know how much weight you can carry.

The BOB Trailer Axles are specifically designed for use with a BOB Trailer The BOB Trailer Axles require you to take the stock “bobbins” off of your BOB Trailer skewer or purchase bobbins from us. The Yoke Mount Trailer Axles have M10x1 metric threaded studs on each end to attach an Extrawheel, Surly Bill and Ted trailers or customer trailers.

Yes! One of our favorite past times is rallying on singletrack trails with a BOB Trailer. The trailer tracks surprisingly well on singletrack. Give it a try.

Any trailer that has two wheels and attaches to the bike at the center of the wheel, on one side – is what we call a Kid Trailer. Sometimes dog-specific trailers or cargo trailers do this as well. That’s okay, in our world, it’s still a Kid Trailer. Popular brands include Burley, Thule, Chariot, Instep, Trek, Carry Freedom, Nordic Cab, etc. There are many, many other smaller brands as well. Just remember, if it has a hitch arm and a hitch that attaches to the center of the wheel, we’ve got you covered with our Kid Trailer axles.

Yes, you can fit your BOB Trailer on to a wider bike, such as a Boost 148 mountain bike, plus tire bike or a fat bike. Watch our YouTube video here for instructions on how to do this.

No, sorry, we don’t have a solution for the Topeak trailer. It is a unique connection system and we just haven’t seen enough of them to warrant a production run of multiple sizes of axles.

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