thru axle finder

Our Thru Axle Finder Guarantee

Robert Axle thru axles are designed and made to fit YOUR bike and YOUR needs! That’s why we have created this handy Thru Axle Finder so you can find the exact axle you need. When you use the Fitment Finder, we guarantee the result of the Finder, 100%.


Thru Axles for Surly Bikes

Surly folks, we get you. You guys like to do cool stuff with your bikes. Now you can use your Surly bike with a trailer or on a trainer. We currently offer our Kid Trailer Axles for Surly GnotBoost and MDS dropouts. Sorry, at this time we do not have an axle that works for using a B.O.B. Trailer, due to the “unique” dropouts that Surly uses.

thru axle for attaching trailer to Surly bike

Kid Trailer Axle for Surly Bikes

Attach any “hitch-style” trailer (such as Thule, Chariot, Burley, etc.) to your thru axle equipped Surly Bike!

12mm Kid Trailer Axle for Surly GnotBoost 12×142/12×148 – KID218

12mm Kid Trailer Axle for Surly MDS 12×177 – KID 219

12mm Kid Trailer Axle for Surly MDS 12×197 – KID220

thru axle for putting surly bike on trainer

Trainer Axle for Surly MDS and GnotBoost

Use your GnotBoost Surly bike on a wheel-on resistance trainer!

Trainer Axle for Surly MDS and GnotBoost – TRA218

Legal statement of the obvious. These are not Surly thru axles, but they are a durable and easy to use replacement. Our goal is to produce a solution for Surly bikes. No permanent modification is required of your bike. At any time you can return your bike to using the Surly stock thru axle. All Surly trademarks are respected.

The Robert Axle Project

All axles are proudly made in
Bend, Oregon

[email protected]

About Robert Axle Project

We like to say that we are the Thru Axle Authority. Not like police style authority, but more like, we know our stuff when it comes to thru axles. That’s why, when you’re shopping for a thru axle, if you use our Axle Fitment Finder we guarantee the result, 100%. If for any reason you use our Axle Fitment Finder and it takes you to the incorrect product for your bike, we’ll exchange it for the right axle at no cost.

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