SKF FP-WP52 Floating Piston Shock for WP 52 mm PDS/Link

SKF floating piston for WP and Ohlins shocks is a replacement to their OEM gas to oil separator which is present in the reservoir of those shocks. OEM separator is normally built with a rigid plastic or metal body surrounded with a thick O-ring sealing into the reservoir body. This type of design causes significant friction against vertical movement of the separator, making it difficult for the shock to react to small high frequency bump absorption. SKF Floating piston is designed to replace OEM separator without having to replace the OEM reservoir design. The SKF floating piston is made using the SKF special low friction compound. It features two sealing lips against the reservoir walls for perfect seal and separation between oil and gas. Moreover the central portion of the piston membrane is designed with a level of flexibility. The SKF Floating piston equipped reservoir allows for increased reactivity of the shock in absorbing high frequency small bumps and in following the oil transfers from/to the body from/to the reservoir. The flexible center membrane starts deforming first, anticipating the complete piston movement, thus enhancing the shock reactivity to small bump absorption.

The SKF FP-WP52 Floating Piston Shock is a replacement gas-to-oil separator for WP and Öhlins shocks with compatible reservoir designs. It replaces the original rigid plastic or metal separator without requiring replacement of the OEM reservoir design.

Made with SKF’s special low-friction compound, this floating piston uses two sealing lips against the reservoir walls to maintain separation between oil and gas. Its design helps reduce friction during vertical piston movement compared with conventional rigid separators.

The piston’s flexible central membrane begins deforming before complete piston movement, helping the shock respond more readily to small, high-frequency bumps. It also supports oil transfer between the shock body and reservoir during operation, enhancing shock reactivity and small-bump absorption.

The SKF FP-WP52 is identified by SKU 115-4110 and part number FP-WP52.

Features:

• Replacement separator: Replaces the OEM gas-to-oil separator in compatible WP and Öhlins shock reservoirs.
• OEM reservoir design: Designed for installation without replacing the OEM reservoir design.
• Low-friction compound: Made using SKF’s special low-friction compound.
• Dual sealing lips: Provides two sealing lips against the reservoir walls for oil and gas separation.
• Flexible membrane: The central piston membrane begins deforming before complete piston movement.
• Shock reactivity: Helps improve response to small, high-frequency bumps and support oil transfer between the shock body and reservoir.
• Brand and part number: SKF FP-WP52.
• SKU: 115-4110.