Precision Thru Axles Designed To Fit YOUR BIKE and YOUR NEEDS!
Kid Trailer Thru Axles and Adapters
For all single arm bike trailer hitches. Whether it's for a Dog Trailer, Kayak Trailer, Cargo Trailer, or Rolling Cooler, these thru axles and hitch adapters are what you need.

Don't see the trailer adapter you need? Don't worry, we make tons of adapters!
Lightweight Thru Axles
Improve your drivetrain efficiency with lightweight, stiff, premium, Made in USA thru axles.

We Make Weird Axles Too!
There are a lot of unique and proprietary axles bike makers have used over the years and we make axles for them too. For some; like Mavic Speed Release we make high quality replacements.
For other like NAILD, and R.A.T. axles for brands like Focus, Cervelo, Merida, Centurion, Marin, Polygon, Argon-18, we make axles and parts to retrofit these bikes to threaded thru axles.
Bike Trainer Thru Axles and QR Adapters
Whether logging miles or warming up before a race, our adapters keep you riding the bike you love.

Single Wheel Trailer Axles
Axles for bike trailers that attach to both sides of your rear wheel. This is where our company began, making BOB Trailer axles to fit our new mountain bikes!

Other Bike Parts
We make some esoteric parts that are hard to categorize but they sure save the day when you find them.
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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.


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