The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21932-04 |
| Category | Adjustment Housings |
| Dimension A | 1.5 mm |
| Dimension B | 52 mm |
| Dimension C | 65.5 mm |
| Thread | M47x1.5 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Adjustment housing M47x1.5/52/65.5, Öhlins part number 21932-04. Öhlins publishes the click count for each unit, and a rebuilt adjuster should return it.
Key Features
- Thread M47x1.5
- Dimension C 65.5 mm
- Dimension B 52 mm
- Original Öhlins service part
- Öhlins part number 21932-04
- Dimension A 1.5 mm
What It Is
Dimensionally this is 1.5 mm, 52 mm, 65.5 mm, which is how it is told apart from the rest of the range. Electronically controlled adjusters replace the needle with a solenoid but keep the same hydraulics. Compression and rebound adjusters are not interchangeable even when they look similar. An adjuster that turns without resistance has lost its detent; the setting is then guesswork.
Why the Original
Parts remain available years after a unit leaves the current price list, which is unusual in this trade. The part number is the contract: it defines material, dimension and finish together. Service parts are ordered per piece unless stated otherwise. Service parts are supplied per piece unless the description says otherwise.
Identifying the Right Part
Part number 21932-04 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. dimension a 1.5 mm, dimension b 52 mm, dimension c 65.5 mm is what distinguishes this number from its neighbours in the range. Click adjusters work through a needle in a seat; the detent spring gives the clicks their feel. A worn adjuster loses its clicks, and with them any chance of a methodical setup.
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: 21932-04
- Category: Adjustment Housings
- Dimension A: 1.5 mm
- Dimension B: 52 mm
- Dimension C: 65.5 mm
- Thread: M47x1.5
- Country of Origin: Sweden
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