Fox 4wt Suspension Fluid - 1 Litre • Epic Bleed Solutions

Official Fox Replacement Fluid: Fox 4wt Suspension Fluid now replaces the discontinued 5wt PTFE Infused Fluid in all GRIP and GRIP2 equipped forks and compatible shocks.
Higher Quality Formula: Proven high performance fluid previously used in Fox high performance shocks, delivering superior damping consistency and longevity.
Wide Compatibility: Suitable for 2025+ Fox and Marzocchi forks with GRIP, GRIP X, GRIP X2, GRIP SL or Rail dampers plus 2021+ DHX, DHX2, Float X and Float X2 shocks.
Simple Service Transition: No need to completely remove old 5wt residue - simply drain normally and refill with 4wt following standard service procedures and volume charts.
Maintains Factory Performance: Ensures your suspension continues to deliver precise damping without mixing fluids or changing service intervals.
Essential For Modern Fox Setup: All new 2025+ Fox and Marzocchi products ship with 4wt in the damper bath chamber - use this fluid for all future services.

Fox 4wt Suspension Fluid is the new official suspension oil from Fox, quietly replacing the discontinued 5wt PTFE Infused Fluid across their product range. This higher quality 4wt fluid has been used successfully in Fox high performance shocks for years and now brings the same reliable performance to forks.

Fox has updated all GRIP, GRIP X, GRIP X2, GRIP SL and Rail damper equipped forks to use 4wt, along with 2021+ DHX, DHX2, Float X and Float X2 shocks. All 2025+ models ship filled with this fluid. When servicing your fork or shock, simply drain the old fluid as normal and refill with Fox 4wt according to the official volume charts - no special flushing or mixing required.

The transition is straightforward and maintains factory damping performance without any change to service intervals. Stockpiles of the old 5wt PTFE fluid can still be used up, but once gone, switch to 4wt for continued optimal suspension feel and reliability.

Keep your Fox or Marzocchi suspension performing at its best with Fox 4wt Suspension Fluid - the correct modern choice for clean, consistent damping in every ride.