How to use our IFP Depth Tool

How to Use the IFP Depth Tool

View the IFP Depth Tool in the store

The IFP Depth Tool is used to accurately set the depth of the internal floating piston (IFP) inside the piggyback reservoir of a rear shock damper. Correct IFP depth is critical to ensure proper oil displacement and pressure balance during compression.

When Do You Need This?
  • Any time you service a damper with an IFP (air or coil)
  • Not required for bladder-based systems (Cane Creek DB Inline, Öhlins, newer EXT, etc.)
  • Standard tool works for all piggyback shocks with IFPs
  • Use the Extra-Long IFP Depth Tool for inline shocks with IFP depths over 50 mm (Monarch R, RT3, RL, etc.)
Why Ours Is Different
  • Compatible with all brands and sizes
  • Made from plastic so it won’t scratch polished aluminum or anodized internals
  • Graduated in mm and inches with 0.01 mm precision
  • Twist-lock seat: no threads, no bolts, fast and repeatable
  • Modular tip: remove it to measure from inside the body or from the IFP center plane (required for many inline shocks)
How It Works

Before your rebuild, confirm the correct IFP depth using the official service manual or one of these reference charts:

After bleeding and sealing the damper (sealhead torqued, bleed port open), push the IFP using the tool until the twist-lock seat contacts the reservoir edge.

For shocks with deep IFPs (50 mm+), remove the tool tip and measure from the center of the IFP, as required by most RockShox inline models.

Very important for non-piggyback shocks:

  • Use the Extra-Long IFP Depth Tool
  • Measure from the center surface of the IFP, not the outer lip
  • Close the IFP air-fill port before threading in the sealhead to prevent the IFP from being pushed deeper during installation
  • After reassembly, verify full usable stroke. A harsh stop or dead zone usually means the IFP is too deep and may cause hydro-lock

Inline shocks are more sensitive. They heat up quickly and are easy to over-pressurize or damage if the IFP depth is incorrect. Setting the depth wrong can destroy the shock.

Also Recommended

⚠️ Warning: Always depressurize the reservoir before inserting any tools. Confirm the bleed port is open and all pressure is fully released. By using this tool, you agree to our Terms of Service and acknowledge the risks of working with damper internals.

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