Öhlins Seal 30/38/5.7Öhlins Seal 30/38/5.7
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number25056-01
CategorySeals
Inner Diameter30 mm
Outer Diameter38 mm
Thickness5.7 mm
Country of OriginSweden
DescriptionThe whole story▼

Seal 30/38/5.7, Öhlins part number 25056-01. A seal that has taken a set no longer springs back and starts to weep.

Key Features

  • Öhlins part number 25056-01
  • Original Öhlins service part
  • Inner Diameter 30 mm
  • Thickness 5.7 mm
  • Outer Diameter 38 mm

What It Is

Öhlins publishes 30 mm, 38 mm, 5.7 mm for 25056-01 — the dimensions are the identity of the part. O-ring sizes are given as inner diameter and cross-section, and both have to match — a close size is not a match. Cross-section is as important as diameter: an O-ring that is too thin will not seal at pressure. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible.

Original Öhlins Part

The part number is the contract: it defines material, dimension and finish together. Öhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. Service parts are supplied per piece unless the description says otherwise. The exploded drawing for your unit names the number; if you do not have it, we do.

Identifying the Right Part

Öhlins identifies this position by the number 25056-01 in the exploded view for the unit it belongs to. Öhlins states inner diameter 30 mm, outer diameter 38 mm, thickness 5.7 mm for this number, and those figures are the deciding ones. Seals are the part of a damper that decides whether it holds its gas charge and its oil, and they are the usual reason a unit ends up on the bench. Replacing seals at service intervals is far cheaper than replacing what a failed seal damages.

Fitting and Setup Service

We are an authorised Öhlins service centre, so you do not have to source the tools and the nitrogen: send us the damper and we rebuild it with the correct parts and the correct setting.

Specifications

  • Brand: Öhlins
  • Part Number: 25056-01
  • Category: Seals
  • Inner Diameter: 30 mm
  • Outer Diameter: 38 mm
  • Thickness: 5.7 mm
  • Country of Origin: Sweden
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08 · Paddock

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