Fox Shox Valve Stack Assy Float DPS

This is a replacement valve stack assembly, not a complete shock. It is a specific internal component designed for servicing or rebuilding a 2018 Fox Float DPS shock.

Compatibility depends on your shock's specific eye-to-eye length and stroke. This assembly is designed for a 190mm x 51mm shock, so you must verify those measurements against your current shock before purchasing.

Yes, servicing internal shock components like the valve stack requires specific suspension tools, including a shock pump, seal picks, and potentially a vice block to avoid damaging the shock body. If you are not experienced with suspension maintenance, it is recommended to have a professional technician perform the installation.

Replacing the valve stack is typically necessary if your shock is suffering from inconsistent damping, a failed lockout, or if the internal shims have become damaged over time. It is a critical step in a full suspension rebuild to restore the factory-tuned performance of your shock.

This specific part is listed as a Trek TSS Reactiv model. While it may share similarities with other Float DPS shocks, the valving and housing are often tuned specifically for Trek's suspension kinematics. You should check your shock's serial number on the Fox website to confirm exact compatibility.