The Damp Champ FOX 4W fork oil in professional 20-litre canister represents the technical reference for intensive maintenance of MTB and bike suspensions. Developed specifically for FOX Racing Shox forks, this fully synthetic formulation combines a high-performance base and latest-generation additives to guarantee smooth, predictable and durable damping on all terrains. Recommended by suspension technicians and professional workshops, it is intended for structures performing numerous overhauls and seeking optimal quality at the best capacity/performance ratio.

Technical summary

The Damp Champ FOX 4W is designed to exceed the requirements of conventional suspension fluids. Its 4W (Weight) viscosity corresponds to FOX original specifications and offers an optimal balance between fluidity and shear resistance. The formulation incorporates anti-foam additives to limit fluid aeration under stress, as well as anti-wear agents protecting seals, pistons and internal sliding surfaces. This 20-litre format is essential for technical centres, bike parks and professional teams requiring strategic stock and high-volume overhauls.

Technical highlights

• 100% synthetic base: Superior thermal stability, ageing resistance and viscosity maintenance even after intensive use.
• FOX 4W specification: Viscosity calibrated for FOX forks, guaranteeing precise damping in accordance with manufacturer recommendations.
• Anti-foam and anti-wear additives: Consistent performance in all conditions (heat, cold, rough terrain), protection of internal parts and seals for maximum longevity.
• Mixability: Can be combined with other Damp Champ viscosities (2.5WT to 15WT) to finely adjust suspension response according to rider weight, terrain or tuning preferences.
• Professional 20-litre format: Large-volume canister for workshops, technical centres and dealers, economy of scale and reduced packaging.
• Wide compatibility: Although specially formulated for FOX, it can be used on other brands of forks and shock absorbers accepting 4W viscosity.

Use and application

Select the Damp Champ viscosity (here FOX 4W) according to the shock absorber or fork manufacturer's specifications. Proceed with complete drainage of used fluid, clean the inside of the system if necessary, then fill with the prescribed volume of Damp Champ FOX 4W. To maximize performance, lubricate seals and moving parts with r.s.p. Slick Kick grease. Respect the volumes and procedures indicated in the suspension technical documentation. Recycle used oil in accordance with current environmental regulations.

Available variants

• Damp Champ FOX 4W 1 L: EAN 9120076117240 variant / Ref. 062072040 — standard format for individuals and small structures
• Damp Champ FOX 4W 20 L: EAN 9120076117240 / Ref. 062022042 — professional large-capacity canister (current product)
• Damp Champ 2.5WT (1 L): EAN 9120050159358 / Ref. 062072002 — extra-light viscosity for very sensitive suspensions
• Damp Champ 5WT (1 L): EAN 9120050159419 / Ref. 062022005 — versatile light viscosity
• Damp Champ 7.5WT (1 L): EAN 9120050159426 / Ref. 062022007 — medium viscosity, standard for many forks
• Damp Champ 10WT (1 L): EAN 9120050159433 / Ref. 062022010 — medium-heavy viscosity
• Damp Champ 15WT (1 L): EAN 9120050159440 / Ref. 062022015 — heavy viscosity for extreme conditions
• Damp Champ Infused 5WT (1 L): EAN 9120050159419 / Ref. 062022205 — special formula for FIT and GRIP cartridges
• Damp Champ NG22 (1 L): Ref. 062080022 — specific formulation
• Damp Champ NG46 (1 L): Ref. 062080046 — specific formulation
• 250 ml formats available: All viscosities also available in 250 ml bottles for occasional maintenance

R.S.P. bikecare: Austrian expertise

Based in Niederneukirchen, Austria, r.s.p. bikecare GmbH has been developing high-end bicycle maintenance products for many years. The Damp Champ range is recognized by suspension technicians worldwide for its consistency, real-world performance and ability to preserve internal components over the long term. Damp Champ benefits from the approval and recommendation of FOX Racing Shox for use in their suspensions.