Öhlins O-ring 57x2.5 NBR70The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00438-48 |
| Category | O-Rings |
| Inner Diameter | 57 mm |
| Cross Section | 2.5 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 57x2.5 NBR70, Öhlins part number 00438-48. An oil seal that has hardened lets the shaft pass oil past it, and the damping fades long before the leak becomes visible.
Key Features
- Öhlins part number 00438-48
- Original Öhlins service part
- Cross Section 2.5 mm
- Material NBR 70
- Inner Diameter 57 mm
What It Is
Öhlins publishes 57 mm, 2.5 mm, NBR 70 for 00438-48 — the dimensions are the identity of the part. A leaking damper is not a cosmetic problem: it is a damper that has stopped controlling the wheel. Size is given as inner diameter and cross-section; a close size is not a match. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks.
Genuine Service Part
This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. An original part keeps the unit within its published specification; a near-equivalent quietly moves it. Service parts are ordered per piece unless stated otherwise. We can check the number against the Öhlins exploded view before you order — just ask.
How to Be Sure It Fits
00438-48 is the Öhlins number for this position — the same one printed in the service documentation. Öhlins states inner diameter 57 mm, cross section 2.5 mm, material NBR 70 for this number, and those figures are the deciding ones. Seal kits gather the pieces one rebuild needs, which avoids a second order mid-job. The groove does half the work: the ring only seals if the groove is clean and undamaged.
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: 00438-48
- Category: O-Rings
- Inner Diameter: 57 mm
- Cross Section: 2.5 mm
- Material: NBR 70
- Country of Origin: Sweden
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