Öhlins O-ring 54x2.5The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00438-79 |
| Category | O-Rings |
| Inner Diameter | 54 mm |
| Cross Section | 2.5 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 54x2.5, Öhlins part number 00438-79. Seals are the part of a damper that decides whether it holds its gas charge and its oil, and they are the usual reason a unit ends up on the bench.
Key Features
- Öhlins part number 00438-79
- Inner Diameter 54 mm
- Cross Section 2.5 mm
- Original Öhlins service part
- Material NBR 70
Function
54 mm, 2.5 mm, NBR 70: that is the whole specification, and it has to match what came out. Assembly grease matters — the wrong compound swells the seal and it fails early. 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.
Genuine Service Part
The alternative to a service part is usually a new damper, which is why this catalogue exists. Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Order by part number. The dimensions below are the ones Öhlins publishes for it. Where a number has been superseded, Öhlins states the replacement — we pass that on.
Getting the Number Right
The reliable route is the exploded drawing: find the position, read the number, order it — 00438-79 in this case. The published dimensions are inner diameter 54 mm, cross section 2.5 mm, material NBR 70 — measure the old part against them if you are unsure. Seals harden with heat and age even when the machine has not been ridden much. O-rings are single-use in a pressurised damper — they are replaced whenever the unit is opened.
Fitting and Setup Service
Ask us about a full service: as an authorised Öhlins centre we strip, inspect, replace what is worn and set the unit back to its specification.
Specifications
- Brand: Öhlins
- Part Number: 00438-79
- Category: O-Rings
- Inner Diameter: 54 mm
- Cross Section: 2.5 mm
- Material: NBR 70
- Country of Origin: Sweden
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