Öhlins O-ring 10x3.5 NBR70Öhlins O-ring 10x3.5 NBR70
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00338-21
CategoryO-Rings
Inner Diameter10 mm
Cross Section3.5 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 10x3.5 NBR70, Öhlins part number 00338-21. A seal that has taken a set no longer springs back and starts to weep.

Key Features

  • Inner Diameter 10 mm
  • Original Öhlins service part
  • Öhlins part number 00338-21
  • Cross Section 3.5 mm
  • Material NBR 70

What It Is

Öhlins gives it as 10 mm, 3.5 mm, NBR 70; nothing about that is approximate. Öhlins specifies the compound by position: NBR where oil is the concern, FKM where heat is. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible. Dust seals keep grit off the running surface; once they are torn, the oil seal behind them has a short life.

Original Öhlins Part

An original part keeps the unit within its published specification; a near-equivalent quietly moves it. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. Order by part number. The dimensions below are the ones Öhlins publishes for it. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson.

Identifying the Right Part

The reliable route is the exploded drawing: find the position, read the number, order it — 00338-21 in this case. Check inner diameter 10 mm, cross section 3.5 mm, material NBR 70 against what you have removed; a close size is not the same part. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks. Dust seals keep grit off the running surface; once they are torn, the oil seal behind them has a short life.

Fitting and Setup Service

Fitting service parts means opening a pressurised unit. As an authorised Öhlins service centre we do that here, with the right tools and a dyno check afterwards — just ask.

Specifications

  • Brand: Öhlins
  • Part Number: 00338-21
  • Category: O-Rings
  • Inner Diameter: 10 mm
  • Cross Section: 3.5 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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