HPX R 4W is an advanced fork oil. The product is formulated from special, highly refined, synthetic base oils. The addition of the most advanced additives makes HPX R 4W a high-tech product for use at Grand Prix level. HPX R 4W fork oil prevents corrosion, oxidation, leaking seals and foaming. It is especially suitable for Grand Prix motorcycles that have to perform in cross enduro, trail, Road and Off Road.