Flat Wrench for Suspension Service

When a suspension service goes past the lower-leg interval into the damper, the next fastener is the internal floating piston reservoir. The IFP sits in a smooth-bored damper body with shallow flats that any standard wrench either rounds or cannot reach. The 1706 is the laser-cut tool steel wrench that fits the IFP flats on RockShox Super Deluxe and Vivid Air shocks, with a 1/2" square drive on the back for the torque wrench the procedure calls for.

The wrench's flat profile sits in the recessed gap between the IFP and the damper-body wall; a space too thin for any standard combination wrench to enter at the right angle. The 1706's geometry was machined specifically for this engagement and nothing else.

What this wrench fits

• IFP service on RockShox Super Deluxe rear shocks
• IFP service on RockShox Vivid Air rear shocks
• Mechanics may find other applications where the same flat profile and depth match

Check your shock manufacturer's service documentation to confirm the wrench's compatibility with your specific shock model before ordering.

Specs

• Material: laser-cut tool steel
• Heat treatment: hardened and tempered for spike-load endurance
• Handle: double-dipped for grip and comfort
• Square drive: 1/2" for torque-wrench engagement
• Length: tuned for the right leverage without overtightening the IFP reservoir
• Article: 1706/2DP-US

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče since 1919, and is the official technical partner of multiple World Tour and downhill teams. Laser-cut tool steel, heat-treated; the wrench transmits a published torque value without flexing or rounding. Laser-cutting the profile is a deliberate construction choice for a tool whose reference faces are also its working surfaces; a forged-and-machined alternative cannot hold the flat-to-flat dimension to the same tolerance.

Pro tip from our mechanics

IFP service goes deeper than lower legs. The wrench is the next step past the foot-bolt stage of a full service; once the shock is out of the frame and the damper is exposed, the 1706 is the tool that lets you reach the IFP without rounding the flats. The published torque value matters; the 1/2" drive on the back is why you can hit that value cleanly rather than by feel.

How to service your suspension fork's lower legs →