Trunnion Mount Shock Holder & Torque Tool by Shockwave Parts

This tool is made for home mechanics and bike shops working on modern mountain bikes with trunnion-mounted rear shocks like those from most Norco Bikes, Knolly, and many others. It gives you a safe, centered interface for clamping and torquing, without risking damage to the shock body or hardware. Compatible with all trunnion-mounted shocks.

What is a Trunnion-Mounted Shock?

Trunnion shocks use two M10 bolts threaded directly into the top of the shock instead of a standard eyelet. 

What You Can Do With This Tool

• Clamping in a Vise: Thread into the M10 trunnion holes to safely clamp the shock and then clamp the tool in the vise to do your work!
• Torquing the Damper Body, Shaft, or Reservoir: Examples include torquing the IFP reservoir of a Fox Float X2 2021+ to 13.6 Nm or the damper body to 16.3 Nm. Use our luggage scale torque calculator for anything over 16 Nm. If using a torque wrench, the included sacrificial sockets are tight-fit and come in three sizes
• Assembly Stabilization: Hold the trunnion side in place when reinstalling the air can or reassembling the shaft stack
• Bleeding: You can tilt the shock and move it while bleeding, its very nice to have that freedom of movement

What’s Included

• Trunnion Mount Holder & Torque Adapter: Threads into standard M10 trunnion holes and then fits into your bench vise perfectly.
• Sacrificial 3/8" Sockets (Set of 4): Three sizes to match slight wrench fitting differences:
  • Small: 9.35-9.45 mm
  • Medium: 9.45-9.55 mm
  • Large: 9.55 mm and above (contact us if unsure)

  Use the Socket Fit Calculator

Disclaimer

This tool is intended for home mechanics. Safe use requires attention to detail and some mechanical skill. By purchasing or using this tool, you agree to our terms of service and accept all risks.