bike touring with family and Thule trailer

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.

Robert Axle Project lightweight thru axle

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.

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