Öhlins O-ring 40.87x3.53 NBR70
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00338-24
CategoryO-Rings
Inner Diameter40.87 mm
Cross Section3.53 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 40.87x3.53 NBR70, Öhlins part number 00338-24. Dust seals keep grit off the running surface; once they are torn, the oil seal behind them has a short life.

Key Features

  • Cross Section 3.53 mm
  • Inner Diameter 40.87 mm
  • Material NBR 70
  • Original Öhlins service part
  • Öhlins part number 00338-24

What It Is

40.87 mm, 3.53 mm, NBR 70: that is the whole specification, and it has to match what came out. Size is given as inner diameter and cross-section; a close size is not a match. A leaking damper is not a cosmetic problem: it is a damper that has stopped controlling the wheel. O-rings are single-use in a pressurised damper — they are replaced whenever the unit is opened.

Why the Original

Öhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. Parts remain available years after a unit leaves the current price list, which is unusual in this trade. The exploded drawing for your unit names the number; if you do not have it, we do. We can check the number against the Öhlins exploded view before you order — just ask.

Identifying the Right Part

The reliable route is the exploded drawing: find the position, read the number, order it — 00338-24 in this case. Öhlins states inner diameter 40.87 mm, cross section 3.53 mm, material NBR 70 for this number, and those figures are the deciding ones. Replacing seals at service intervals is far cheaper than replacing what a failed seal damages. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible.

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: 00338-24
  • Category: O-Rings
  • Inner Diameter: 40.87 mm
  • Cross Section: 3.53 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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