The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00438-53 |
| Category | O-Rings |
| Inner Diameter | 37 mm |
| Cross Section | 2.5 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 37x2.5 NBR 70, Öhlins part number 00438-53. Size is given as inner diameter and cross-section; a close size is not a match.
Key Features
- Inner Diameter 37 mm
- Cross Section 2.5 mm
- Original Öhlins service part
- Material NBR 70
- Öhlins part number 00438-53
Where It Sits
Dimensionally this is 37 mm, 2.5 mm, NBR 70, which is how it is told apart from the rest of the range. Static seals and dynamic seals are not interchangeable even in the same size. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks. A seal that has taken a set no longer springs back and starts to weep.
Original Öhlins Part
Rebuilding to specification only works if the parts are to specification — that starts here. The alternative to a service part is usually a new damper, which is why this catalogue exists. Service parts are ordered per piece unless stated otherwise. Send us the model and serial number of your unit and we will confirm the position before you order.
Identifying the Right Part
The reliable route is the exploded drawing: find the position, read the number, order it — 00438-53 in this case. Öhlins states inner diameter 37 mm, cross section 2.5 mm, material NBR 70 for this number, and those figures are the deciding ones. A leaking damper is not a cosmetic problem: it is a damper that has stopped controlling the wheel. Öhlins uses seals with a spring-loaded lip so they follow the shaft as it wears.
Fitting and Setup Service
Fitting service parts means opening a pressurised unit. As an authorised Öhlins service centre we do that here, with the right tools and a dyno check afterwards — just ask.
Specifications
- Brand: Öhlins
- Part Number: 00438-53
- Category: O-Rings
- Inner Diameter: 37 mm
- Cross Section: 2.5 mm
- Material: NBR 70
- Country of Origin: Sweden
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