The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21820-06 |
| Category | Adjusters |
| Country of Origin | Sweden |
DescriptionThe whole story▼
EC adjuster assy SD 90°, Öhlins part number 21820-06. Hydraulic preload adjusters are sealed units and are replaced rather than opened.
Key Features
- Original Öhlins service part
- Öhlins part number 21820-06
Where It Sits
There is no measurement to check here — the number and the exploded view identify it. Click adjusters work through a needle in a seat; the detent spring gives the clicks their feel. Öhlins publishes the click count for each unit, and a rebuilt adjuster should return it. Compression and rebound adjusters are not interchangeable even when they look similar.
Original Öhlins Part
Öhlins numbers every position so a workshop can order precisely what it needs, not a whole assembly. Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. The exploded drawing for your unit names the number; if you do not have it, we do. Send us the model and serial number of your unit and we will confirm the position before you order.
How to Be Sure It Fits
Öhlins identifies this position by the number 21820-06 in the exploded view for the unit it belongs to. This position has no published dimension, so the part number is the only reliable identifier. Hydraulic preload adjusters are sealed and pressurised; they are replaced as a unit. Electronically controlled adjusters replace the needle with a solenoid but keep the same hydraulics.
Fitting and Setup Service
A damper rebuild is workshop work: it needs the unit dismantled, the shim stack rebuilt in the correct order and the gas charge reset. We are an authorised Öhlins service centre and do exactly that in house — send us the unit or ask us to fit the part with your order.
Specifications
- Brand: Öhlins
- Part Number: 21820-06
- Category: Adjusters
- Country of Origin: Sweden
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