Öhlins O-ring 25x3 NBR70Öhlins O-ring 25x3 NBR70
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00638-85
CategoryO-Rings
Inner Diameter25 mm
Cross Section3 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 25x3 NBR70, Öhlins part number 00638-85. Size is given as inner diameter and cross-section; a close size is not a match.

Key Features

  • Inner Diameter 25 mm
  • Cross Section 3 mm
  • Original Öhlins service part
  • Material NBR 70
  • Öhlins part number 00638-85

Function

Dimensionally this is 25 mm, 3 mm, NBR 70, which is how it is told apart from the rest of the range. Dust seals keep grit off the running surface; once they are torn, the oil seal behind them has a short life. The groove does half the work: the ring only seals if the groove is clean and undamaged. Static seals and dynamic seals are not interchangeable even in the same size.

Why the Original

The part is identical to what Öhlins fits in production — same supplier, same specification. Öhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. Order by part number — descriptions repeat across sizes, numbers do not. The Öhlins exploded view names the number for each position; we can look it up if you do not have it.

Identifying the Right Part

Part number 00638-85 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states inner diameter 25 mm, cross section 3 mm, material NBR 70 for this number, and those figures are the deciding ones. Size is given as inner diameter and cross-section; a close size is not a match. Static seals and dynamic seals are not interchangeable even in the same size.

Fitting and Setup Service

A damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.

Specifications

  • Brand: Öhlins
  • Part Number: 00638-85
  • Category: O-Rings
  • Inner Diameter: 25 mm
  • Cross Section: 3 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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08 · Paddock

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