The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21933-14 |
| Category | Adjustment Housings |
| Dimension A | 1 mm |
| Dimension B | 53.5 mm |
| Dimension C | 31 mm |
| Thread | M50x1 |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Adjustment housing M50x1/53.5/31, Öhlins part number 21933-14. Its bores hold seals, so a scored housing leaks as surely as a shaft seal.
Key Features
- Öhlins part number 21933-14
- Dimension C 31 mm
- Dimension B 53.5 mm
- Original Öhlins service part
- Thread M50x1
- Dimension A 1 mm
Where It Sits
Öhlins gives it as 1 mm, 53.5 mm, 31 mm; nothing about that is approximate. Öhlins publishes the click count for each unit, and a rebuilt adjuster should return it. The adjuster is the part a rider actually touches, and its detents are what make a setting repeatable. Hydraulic preload adjusters are sealed units and are replaced rather than opened.
Why the Original
Öhlins is one of the few suspension makers that still supplies every position in the exploded view as a single part. This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. The exploded drawing for your unit names the number; if you do not have it, we do. If you are between two sizes, send us the measurement and we will check it against the catalogue.
How to Be Sure It Fits
Öhlins identifies this position by the number 21933-14 in the exploded view for the unit it belongs to. Öhlins states dimension a 1 mm, dimension b 53.5 mm, dimension c 31 mm for this number, and those figures are the deciding ones. Electronically controlled adjusters replace the needle with a solenoid but keep the same hydraulics. Preload adjusters carry the full spring force and are built accordingly.
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: 21933-14
- Category: Adjustment Housings
- Dimension A: 1 mm
- Dimension B: 53.5 mm
- Dimension C: 31 mm
- Thread: M50x1
- Country of Origin: Sweden
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