+2,000 Five Star Reviews and Counting





 

This is a quality axle that works great! We’re very satisfied with it. This company is great with awesome customer service – with my order I asked them to include a drawing of a dinosaur riding a bicycle, and the CEO drew the cutest dino on a bike! I was so excited to open my package and see the drawing!





 

I recently purchased an axle for my BOB trailer and couldn’t be happier. From the axle finder tool through to the fast processing and shipment of my order, and even the installation how-to video, everything with the process was smooth and easy. The axle fits perfectly and installation was a snap. I would (and will) wholeheartedly recommend the Robert Axle Project to anyone looking for a thru-axle trailer mount.

Ben





 

This axle worked great so I can now pull my twins in our chariot on my mountain bike. Easy instructions, great website. Thanks!

Jasmin





 

I ordered from Canada and my thru axle was shipped and delivered in only 2 days! The axle finder was really helpful to find the right size I needed and was the only website that supplied the size I needed for my bike. The thru axle fit perfectly into my bike and I can’t wait to use my road bike for training on my trainer!

Sydney

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KING THRU AXLES

12mm and 15mm Thru Axles

Made in collaboration with Chris King Precision Components and machined to match the shape of their iconic headset caps these refined and gorgeous axles are the perfect piece to cap off your dream build.

Available in 3 colors; Black, 3D-Violet, and Matte Turquoise, and 10 of the most common axle sizes available.

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Precision Thru Axles Designed and Made To Fit YOUR BIKE and YOUR NEEDS.

Thru Axles for Bikes

12mm and 15mm Thru Axles

The Robert Axle Project makes thru axles for bikes. Replace your stock axle with a lightweight Lightning Bolt-On Axle or tow your kids with our Kid Trailer Axle. Our products allow cycling families, adventurers, commuters and enthusiasts to enjoy traveling by bicycle without leaving their cargo behind.

With our thru axles, you can lighten up your bike or attach your favorite bike trailer. We have thru axles for Burley Trailers, Thule Trailers, BOB Trailers and more—to any bicycle that has a 12mm thru axle. Find a thru-axle for any mountain, fat, road, cross, and electric bikes.

Your Best Bike. Your Best Adventure.

kid trailer along pathway at Old Mill
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Robert Axle Project Trainer Axle on a blue background

We Are the Bike Thru Axle Experts

We understand that there are two priorities for you. Our product must provide a seamless fit between you and your beloved bike and your precious cargo. And it must be durable and secure to bring you home from your adventures, whether around town or around the world. Each axle is specifically engineered and produced to provide a safe and secure connection.

Designed, tested and made in Bend, Oregon, USA.

Wahoo KICK Thru Axle Adapter Kit

Our trainer side adapter is firmly held in place making it easier to attach and remove your bike from the trainer.

Designed to support and protect your bike the same way a thru axle does so there is no undue stress applied to your frame

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The Definitive Guide to Biking With Kids: 2022 Edition

We’ve learned a lot in the last two years, riding the waves of a global pandemic. Hours on end inside our houses, working from home, and homeschooling led many parents to discover or re-discover the joy of riding bikes with their kids. Family cycling outings can be done from virtually anywhere. You can go out for 30 minutes, 3 hours,...
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Dogpacking: Bringing My Dog on the Road Less Traveled

By Kristen Quadrone Dogpacking in Central Oregon. Photo by Katie Sox, @sox.katie My route is planned and I’ve got all my gear packed, but I run through the list just to be sure. “Tent, poles, and stakes: check.  Sleeping bag and pad: check.  Water, snacks --” A small presence in the room interrupts my thought. I know that sound all...
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Cyclists love their R.A.T. replacement axles

Part of our job is to keep up with bike industry standards and specific individual bike brand standards. In the past few years, we've developed a series of thru axles that can replace the R.A.T. (Rapid Axle Technology) found on a few bike brands, namely FOCUS and Cervelo. We've gotten an unexpected volume of great feedback from customers below! See...
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Robert Axle Project Owners Acquire Old Man Mountain Products

Bend, Oregon, August 1, 2019 - The Robert Axle Project, a U.S. manufacturer of thru axles for bikes based in Bend, Oregon, is pleased to announce the purchase of Old Man Mountain Products of Santa Barbara, California. The acquisition of Old Man Mountain will complement the existing product portfolio of The Robert Axle Project and both brands will continue to...
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Derrick Bell – The ReBuilder

We are so honored to have known D-Rock for the last 25 years. He was one of our earliest product testers and Ambassadors for Robert Axles. Watch him ride and you can see how he's one of the reasons we build our axles to the most durable, strongest quality that we can. He shreds, with and without a B.O.B. Trailer...
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5 Uncommon Tips and Tricks for a Most Excellent Weekend Bike Tour

Planning a mini-bike tour is a little like planning dinner – you want it to be great, but you also don’t want to stress out and worry too much about it. Often times, like a good meal, you can pull something together in a fairly short amount of time, with little effort. And like anything, with practice comes perfection, or...
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Take Your Toddler on a Bike Tour

You’re a cyclist. You love your Wednesday evening rides with the buddies and you geek out on gear and maybe you’ve gone on a few bike tours in your lifetime. You’re also a Mom or a Dad, so you want to infect your kids with the joy of cycling that has made your life that much more wonderful. The great...
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Bring Your Kids Biking with a Robert Axle Thru Axle

The Kid Trailer Axles are easy to install and use, so you can bring your kids biking with you. Child carriers, such as Burley, Thule, Chariot, provide a great way to share your adventures with those you love. With our 12mm Thru Axles for Kid Trailers, you can attach "hitch style" trailer to any bike with a rear 12mm thru axle—mountain, road, fat,...
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Breaking Axles Is Fun! (Also known as: Why “made in USA” matters to us)

Let's talk a bit about “Made in USA”. It’s a complicated thing, we know. Affordability, quality, customer service, and practicality all come into play. Making our thru axles here, instead of China or Taiwan, is important to us because we can employ local skilled people and support our local economy. We also like to be hands on—we prefer to oversee...
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Five Ingenious Hacks to Make Your Bike Ride Better

Several small companies are building niche parts and pieces that make our cycling gear cheaper and more versatile. By: Aaron Gulley Posted on Outside Online: March 3, 2017 The big brands usually get all the coverage and credit for innovations and splashy bikes. But several boutique manufacturers have also come out with important advances recently. One great thing about the bike...
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