Öhlins Spacer 18/31.8/3The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 21974-02 |
| Category | Spacers |
| Dimension A | 18 mm |
| Dimension B | 31.8 mm |
| Dimension C | 3 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Spacer 18/31.8/3, Öhlins part number 21974-02. Pins and dowels locate parts to each other; without them the assembly is merely clamped, not positioned.
Key Features
- Dimension C 3 mm
- Dimension B 31.8 mm
- Öhlins part number 21974-02
- Dimension A 18 mm
- Original Öhlins service part
Function
Öhlins publishes 18 mm, 31.8 mm, 3 mm for 21974-02 — the dimensions are the identity of the part. Pins and dowels locate parts to each other; without them the assembly is merely clamped, not positioned. Öhlins uses metric threads throughout, but the length and head form are specific to the position. Its length is a specification, not a filler — a millimetre changes what the unit does.
Original Öhlins Part
Parts remain available years after a unit leaves the current price list, which is unusual in this trade. Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. If you are unsure which number your unit takes, send us the model and serial number of the damper and we will look it up. If the unit is already apart, compare the published dimensions with the part in your hand.
Identifying the Right Part
The reliable route is the exploded drawing: find the position, read the number, order it — 21974-02 in this case. dimension a 18 mm, dimension b 31.8 mm, dimension c 3 mm is what distinguishes this number from its neighbours in the range. Circlips hold axial position under load; a sprung one lets the assembly walk. A spacer sets an internal dimension: preload on a stack, free length, or the position of a piston.
Fitting and Setup Service
If you would rather not open the damper yourself, we can do it — we are an authorised Öhlins service centre and rebuild these units as a matter of routine.
Specifications
- Brand: Öhlins
- Part Number: 21974-02
- Category: Spacers
- Dimension A: 18 mm
- Dimension B: 31.8 mm
- Dimension C: 3 mm
- Country of Origin: Sweden
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