The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 00438-77 |
| Category | O-Rings |
| Inner Diameter | 170.7 mm |
| Cross Section | 1.78 mm |
| Material | NBR 70 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
O-ring 170.7x1.78 NBR70, Öhlins part number 00438-77. Static seals and dynamic seals are not interchangeable even in the same size.
Key Features
- Material NBR 70
- Cross Section 1.78 mm
- Original Öhlins service part
- Öhlins part number 00438-77
- Inner Diameter 170.7 mm
What It Is
This one measures 170.7 mm, 1.78 mm, NBR 70, and those figures are what separate it from the neighbouring numbers. The groove does half the work: the ring only seals if the groove is clean and undamaged. A leaking damper is not a cosmetic problem: it is a damper that has stopped controlling the wheel. 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.
Genuine Service Part
Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. Service parts are supplied per piece unless the description says otherwise. Send us the model and serial number of your unit and we will confirm the position before you order.
Getting the Number Right
Order under 00438-77. Where several sizes share a description, only the number separates them. inner diameter 170.7 mm, cross section 1.78 mm, material NBR 70 is what distinguishes this number from its neighbours in the range. Öhlins specifies the compound by position: NBR where oil is the concern, FKM where heat is. Dust seals keep grit off the running surface; once they are torn, the oil seal behind them has a short life.
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: 00438-77
- Category: O-Rings
- Inner Diameter: 170.7 mm
- Cross Section: 1.78 mm
- Material: NBR 70
- Country of Origin: Sweden
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