What does the Screwless Sealhead Negative Spring Compression Tool do?

This tool compresses the sealhead against the main piston during final reassembly and bleeding on shocks that use a negative spring behind the piston. It prevents oil displacement during shaft installation, preserves correct IFP depth, and reduces the risk of cavitation or under-filled dampers. It is a critical step in servicing RockShox Vivid, Super Deluxe, EXT, and similar damper designs.

Which shocks is the Screwless Sealhead Negative Spring Compression Tool compatible with?

The tool is compatible with RockShox Vivid Air, RockShox Vivid Coil, RockShox Super Deluxe, and EXT shocks that use a piston-back negative spring design. It locks into the RockShox Vivid 6-Pin Wrench (sold separately) for press-fit shaft alignment. Verify compatibility before use on other damper designs with similar architecture.

What is included with the Screwless Sealhead Negative Spring Compression Tool?

The tool includes a Knipex adapter at no extra cost, which is required for servicing 2023+ Super Deluxe Coil and 2025+ Vivid Coil shocks and enables use with Knipex 10-inch pliers. The RockShox Vivid 6-Pin Wrench is not included and must be purchased separately. Older counter-measure tools are not compatible with Knipex without a chamferless wrench.

How does the Screwless Sealhead Negative Spring Compression Tool differ from standard sealhead compression tools?

Unlike conventional sealhead tools that use screws, threads, or fasteners for clamping, this tool uses a fully screwless clip-on arm design with integrated pivots and rail guidance. This allows faster installation even while holding the piston in compression, and eliminates the risk of thread wear or fastener failure during repeated service cycles. The design also integrates directly with the RockShox Vivid 6-Pin Wrench for precise shaft alignment.

Who should use the Screwless Sealhead Negative Spring Compression Tool?

This tool is intended for experienced home mechanics who perform their own rear shock damper rebuilds. Damper work involves high-pressure IFP chambers that can cause serious injury if opened while pressurized; users must fully understand the system and follow official service manuals for their specific shock. It is not recommended for first-time shock service attempts.

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Shockwave Parts

Negative Spring Damper Compression Tool | Counter-Measure

$49.49 CAD

Promotion Épuisé

Frais d'expédition calculés à l'étape de paiement.

Outil de compression à spring négatif

Outil simple et robuste pour comprimer le sealhead sur les shocks avec un negative spring dans le damper.

À quoi sert cet outil

Cet outil permet de pousser le negative spring contre le sealhead pour régler le shock correctement.

Permet de respecter la IFP depth du manuel
Empêche le shaft de bouger après la pressurisation
Évite un mauvais oil volume et un damper déséquilibré

Sans compression du negative spring, le shaft ressort après pressurisation, ce qui fausse la IFP depth.

Comment ça fonctionne

Place l’outil sur le sealhead
Tire légèrement sur le shaft et serre le knob
Ça comprime complètement le negative spring

Deux façons de l’utiliser :

Avec shocks 6-pin (Vivid) : se monte directement dans la 6-pin wrench
Avec pliers (Super Deluxe / Vivid Coil) : utiliser une Knipex 8" ou équivalent

Après le bleed, retire l’outil, serre le sealhead au torque spec, puis règle la IFP depth.

Clamping solide et fiable