The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21624-02 |
| Category | Cylinder Tubes |
| Diameter | 25 mm |
| Length | 299 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Cylinder tube 25/299, Öhlins part number 21624-02. Öhlins turns and hones each tube to a defined roundness, because an out-of-round bore leaks past the piston.
Key Features
- Original Öhlins service part
- Öhlins part number 21624-02
- Length 299 mm
- Diameter 25 mm
Where It Sits
At 25 mm, 299 mm it fits one position only; the next size up carries a different number. Diameter and length together identify the tube — both are specific to the damper it came from. The cylinder tube is the working bore of the damper: the piston runs in it, and its finish decides how well the piston rings seal. The tube is what the whole damper is built around: everything else references its bore.
Original Öhlins Part
Öhlins manufactures service parts on the same lines as production parts — there is no second quality. Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Öhlins numbers do not follow a logic you can guess — always read them from the documentation. We can supply the whole position from the drawing rather than the single piece if that is easier.
Identifying the Right Part
Öhlins identifies this position by the number 21624-02 in the exploded view for the unit it belongs to. Öhlins states diameter 25 mm, length 299 mm for this number, and those figures are the deciding ones. Twin-tube dampers use two concentric tubes, and both are listed separately. Aluminium tubes are hard-anodised in the bore so the piston band has a hard surface to run against.
Fitting and Setup Service
Öhlins recommends that its units are serviced by an authorised centre. We are one: rebuild, revalve and setup all happen in our own workshop.
Specifications
- Brand: Öhlins
- Part Number: 21624-02
- Category: Cylinder Tubes
- Diameter: 25 mm
- Length: 299 mm
- Country of Origin: Sweden
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