Öhlins O-ring 42x2 NBR 70The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00438-86 |
| Category | O-Rings |
| Inner Diameter | 42 mm |
| Cross Section | 2 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 42x2 NBR 70, Öhlins part number 00438-86. 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 00438-86
- Cross Section 2 mm
- Material NBR 70
- Inner Diameter 42 mm
- Original Öhlins service part
Where It Sits
00438-86 is the 42 mm, 2 mm, NBR 70 version — Öhlins lists each size separately. Static seals and dynamic seals are not interchangeable even in the same size. The groove does half the work: the ring only seals if the groove is clean and undamaged. Öhlins recommends replacing seals whenever the unit is opened, not only when it leaks.
Original Öhlins Part
The alternative to a service part is usually a new damper, which is why this catalogue exists. Parts remain available years after a unit leaves the current price list, which is unusual in this trade. Order by part number. The dimensions below are the ones Öhlins publishes for it. Tell us the damper's model designation and year and we will match the number for you.
Getting the Number Right
The reliable route is the exploded drawing: find the position, read the number, order it — 00438-86 in this case. Öhlins states inner diameter 42 mm, cross section 2 mm, material NBR 70 for this number, and those figures are the deciding ones. Nitrile, Viton and PTFE behave differently with temperature, and Öhlins picks per position. Cross-section is as important as diameter: an O-ring that is too thin will not seal at pressure.
Fitting and Setup Service
If you would rather not open the damper yourself, we can do it — we are an authorised Öhlins service centre and rebuild these units as a matter of routine.
Specifications
- Brand: Öhlins
- Part Number: 00438-86
- Category: O-Rings
- Inner Diameter: 42 mm
- Cross Section: 2 mm
- Material: NBR 70
- Country of Origin: Sweden
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