Öhlins O-ring 59.92x3.53Öhlins O-ring 59.92x3.53
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00638-08
CategoryO-Rings
Inner Diameter59.92 mm
Cross Section3.53 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 59.92x3.53, Öhlins part number 00638-08. O-ring sizes are given as inner diameter and cross-section, and both have to match — a close size is not a match.

Key Features

  • Öhlins part number 00638-08
  • Inner Diameter 59.92 mm
  • Cross Section 3.53 mm
  • Original Öhlins service part
  • Material NBR 70

Function

Dimensionally this is 59.92 mm, 3.53 mm, NBR 70, which is how it is told apart from the rest of the range. Cross-section is as important as diameter: an O-ring that is too thin will not seal at pressure. The dust seal does the hard work: it keeps the grit that would score the shaft away from the oil seal. Öhlins uses seals with a spring-loaded lip so they follow the shaft as it wears.

Why the Original

Öhlins keeps service parts available for units long after they leave the current price list. A damper that can be rebuilt is a damper that stays on the bike; that is the whole argument for original service parts. Tell us the damper's model designation and year and we will match the number for you. Order by part number. The dimensions below are the ones Öhlins publishes for it.

How to Be Sure It Fits

The reliable route is the exploded drawing: find the position, read the number, order it — 00638-08 in this case. Check inner diameter 59.92 mm, cross section 3.53 mm, material NBR 70 against what you have removed; a close size is not the same part. Öhlins specifies seal compounds for temperature stability rather than for the lowest unit cost. Cross-section is as important as diameter: an O-ring that is too thin will not seal at pressure.

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: 00638-08
  • Category: O-Rings
  • Inner Diameter: 59.92 mm
  • Cross Section: 3.53 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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