Fox Suspension Lower Leg Assembly

This assembly is specifically designed for 2021 Fox 36 series forks with 29-inch wheels and a 15x110mm axle standard. You should verify your fork's model year and chassis series, as these parts are not universal across different Fox fork generations.

Yes, this is a factory-direct replacement that includes the bushings and seals already installed. It is designed to be a drop-in component, though you will still need to transfer your existing internals, such as the air spring and damper, into the new chassis.

The lower legs themselves are compatible with the 130-170mm travel range specified for the 2021 36 chassis. However, ensure your internal air spring assembly is configured for the specific travel you intend to run, as the lower legs do not dictate the travel length.

Replacing the entire assembly is often necessary if the magnesium lowers have sustained structural damage, such as deep gouges, or if the bushing bores have worn beyond the point where standard service can restore smooth performance. It is the most reliable way to eliminate persistent play and restore factory-level stiffness.

You will need standard suspension service tools, including a torque wrench, socket set, and appropriate suspension fluid for the bath oil. While the process is straightforward for experienced mechanics, it requires precision to ensure the damper and air spring are seated correctly without damaging the new seals.