Öhlins O-ring 6.75x1.78 NBR70
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00338-58
CategoryO-Rings
Inner Diameter6.75 mm
Cross Section1.78 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 6.75x1.78 NBR70, Öhlins part number 00338-58. A seal that has taken a set no longer springs back and starts to weep.

Key Features

  • Cross Section 1.78 mm
  • Öhlins part number 00338-58
  • Original Öhlins service part
  • Inner Diameter 6.75 mm
  • Material NBR 70

Function

Dimensionally this is 6.75 mm, 1.78 mm, NBR 70, which is how it is told apart from the rest of the range. Size is given as inner diameter and cross-section; a close size is not a match. Nitrile, Viton and PTFE behave differently with temperature, and Öhlins picks per position. Öhlins specifies the compound by position: NBR where oil is the concern, FKM where heat is.

Genuine Service Part

This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. The exploded drawing for your unit names the number; if you do not have it, we do. Order by part number — descriptions repeat across sizes, numbers do not.

Identifying the Right Part

Part number 00338-58 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. inner diameter 6.75 mm, cross section 1.78 mm, material NBR 70 is what distinguishes this number from its neighbours in the range. Öhlins uses seals with a spring-loaded lip so they follow the shaft as it wears. Seal heads combine the oil seal, the dust seal and the bushing in one assembly.

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: 00338-58
  • Category: O-Rings
  • Inner Diameter: 6.75 mm
  • Cross Section: 1.78 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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