Öhlins O-ring 39x3The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00638-11 |
| Category | O-Rings |
| Inner Diameter | 39 mm |
| Cross Section | 3 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 39x3, Öhlins part number 00638-11. Static seals and dynamic seals are not interchangeable even in the same size.
Key Features
- Cross Section 3 mm
- Inner Diameter 39 mm
- Original Öhlins service part
- Öhlins part number 00638-11
Where It Sits
Öhlins gives it as 39 mm, 3 mm; nothing about that is approximate. 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 specifies seal compounds for temperature stability rather than for the lowest unit cost.
Genuine Service Part
Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. Öhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. If you are between two sizes, send us the measurement and we will check it against the catalogue. We can check the number against the Öhlins exploded view before you order — just ask.
Identifying the Right Part
00638-11 is the Öhlins number for this position — the same one printed in the service documentation. The published dimensions are inner diameter 39 mm, cross section 3 mm — measure the old part against them if you are unsure. O-rings are single-use in a pressurised damper — they are replaced whenever the unit is opened. Öhlins specifies the compound by position: NBR where oil is the concern, FKM where heat is.
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: 00638-11
- Category: O-Rings
- Inner Diameter: 39 mm
- Cross Section: 3 mm
- Country of Origin: Sweden
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