The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21819-01 |
| Category | Adjustment Screws |
| Dimension A | 5 mm |
| Dimension B | 20.5 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Adjustment screw 5/20.5, Öhlins part number 21819-01. Electronically controlled adjusters replace the needle with a solenoid but keep the same hydraulics.
Key Features
- Dimension B 20.5 mm
- Öhlins part number 21819-01
- Original Öhlins service part
- Dimension A 5 mm
Where It Sits
21819-01 is the 5 mm, 20.5 mm version — Öhlins lists each size separately. Öhlins publishes the click count for each unit, and a rebuilt adjuster should return it. Hydraulic preload adjusters are sealed units and are replaced rather than opened. Needle and seat together meter the bleed flow; damage to either changes the whole adjustment range.
Genuine Service Part
Öhlins manufactures service parts on the same lines as production parts — there is no second quality. The part is identical to what Öhlins fits in production — same supplier, same specification. Tell us the damper's model designation and year and we will match the number for you. Order by part number — descriptions repeat across sizes, numbers do not.
Identifying the Right Part
Öhlins identifies this position by the number 21819-01 in the exploded view for the unit it belongs to. The published dimensions are dimension a 5 mm, dimension b 20.5 mm — measure the old part against them if you are unsure. Click adjusters work through a needle in a seat; the detent spring gives the clicks their feel. Hydraulic preload adjusters are sealed units and are replaced rather than opened.
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: 21819-01
- Category: Adjustment Screws
- Dimension A: 5 mm
- Dimension B: 20.5 mm
- Country of Origin: Sweden
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