Öhlins O-ring 54x4The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00338-90 |
| Category | O-Rings |
| Inner Diameter | 54 mm |
| Cross Section | 4 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 54x4, Öhlins part number 00338-90. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks.
Key Features
- Original Öhlins service part
- Öhlins part number 00338-90
- Material NBR 70
- Inner Diameter 54 mm
- Cross Section 4 mm
What It Is
This one measures 54 mm, 4 mm, NBR 70, and those figures are what separate it from the neighbouring numbers. O-rings are single-use in a pressurised damper — they are replaced whenever the unit is opened. Assembly grease matters — the wrong compound swells the seal and it fails early. O-ring sizes are given as inner diameter and cross-section, and both have to match — a close size is not a match.
Original Öhlins Part
Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Suspension is one of the few areas where the original part is genuinely the cheaper decision. We can supply the whole position from the drawing rather than the single piece if that is easier. If you are unsure which number your unit takes, send us the model and serial number of the damper and we will look it up.
How to Be Sure It Fits
Order under 00338-90. Where several sizes share a description, only the number separates them. inner diameter 54 mm, cross section 4 mm, material NBR 70 is what distinguishes this number from its neighbours in the range. 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. Seal heads combine the oil seal, the dust seal and the bushing in one assembly.
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: 00338-90
- Category: O-Rings
- Inner Diameter: 54 mm
- Cross Section: 4 mm
- Material: NBR 70
- Country of Origin: Sweden
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