How to use the Trunnion Shock Vise Holder/Torque Tool
How to Use the Trunnion Torque Tool
View the Trunnion Mount Shock Holder & Torque Tool in the store
The Trunnion Mount Torque Tool serves multiple critical roles when working on trunnion-mounted rear shocks. It is designed to let you clamp, orient, bleed, and torque safely without risking damage to the damper body or threads.
1. Safe Vise Clamping
This tool allows you to clamp a trunnion-mounted shock securely in a vise without touching the delicate M10 fine threads on the damper body. Clamping directly on those threads is extremely risky. If it slips, the shock is done.
The tool threads into both trunnion eyelet holes and creates a centered, rigid interface. It can withstand more than triple the torque any service procedure will ever require. Once mounted in the vise, the shock is fully stable and safe to work on.
2. Orientation & Bleeding
The tool also acts as a precise orientation handle when bleeding dampers with an IFP. You can rotate the shock so the IFP port faces up or sideways, which is especially useful on shocks like the Fox Float X2. This makes the bleeding process cleaner and easier.
3. Torquing When the Damper Body Threads Into Something
On some shocks, such as the Float X, DPX2, and Float X2 (2021–2025), the damper body must be threaded into the shaft or damper tube.
On a standard eyelet-mounted shock, you would clamp the shaft using a shaft clamp and torque the body via the eyelet. With a trunnion shock, there is no eyelet to grab.
This tool solves that problem. It allows safe torque application on the trunnion side while the shaft is held using the included custom wrenching arm. Without this tool, you would need a wrench spanning 54 mm with 28 mm clearance, which does not exist and would destroy the surface finish even if it did.
Using Torque Safely
For accurate and repeatable torque application, we strongly recommend using a luggage scale together with our torque calculator. This method allows you to control torque precisely by applying force at a known lever arm.
In practice, luggage scales are often more reliable than low-cost torque wrenches. Calibration is usually more consistent, and the applied force is directly measurable.
Holder-Only Option
Honestly, the holder alone does most of the work. I personally use the holder almost every time and only needed the wrench once to replace a DPX2 shaft.
Final Notes
This tool was designed specifically for trunnion-mounted suspension.
You only get one chance with damper body threads. This tool exists to make sure you do not waste it.