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Our line of axles has just received two new additions, as we now offer axles that are compatible with the Syntace X-12 System. The primary difference that distinguishes these axles from our other axles is the conical washer, where our other axles have a flat washer. Any bicycle brand that uses the Syntace X-12 System will also be able to use these new axles, which includes many models from Specialized, Cannondale, Intense, 3T, Canyon, and others.

When developing the Rear Axle, Wolf Tooth engineers knew that they wouldn’t be able to get away with any old factory replacement part, even if it was made in Minnesota to aerospace standards. The Wolf Tooth Rear Axle uses a captive conical stainless steel washer under the head to reduce friction on the dropout face. This protects your expensive frame, transfers more of the tightening torque to clamping load for a stiffer interface and prevents the axle from sticking or galling when you want to remove it.

These are also a great replacement option for lost or damaged stock axles. Always apply a small amount of grease to the washer and threads when installing.

Check out the Axle Caps for added protection and the Trainer Caps for those days on the trainer. 


  • 12mm Rear Thru Axle for Syntace X-12 system
  • Axle length is compatible +/- 2mm
  • Axle length is independent of hub dimensions. Please use the axle measurement guide to find the axle length needed.  Make sure to print it at 100% for accurate measurements.

[ A4 Metric Guide ]

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Tech Specs

Weight: 159 • 42g  |  165 • 43g 
Material:  7075-T6 aluminum, stainless steel conical washer
Diameter: 12mm
Thread Pitch: 1mm
Thread Length: 12mm
Tool Interface:  5mm and 6mm hex key
Torque Spec:  12 Nm max
Made in the USA

Patent and trademark information

WARNING Handling this product will expose you to chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For further information go to