Öhlins Shims 6/21/0.25The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 01425-21 |
| Category | Shims |
| Inner Diameter | 6 mm |
| Outer Diameter | 21 mm |
| Thickness | 0.25 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Shims 6/21/0.25, Öhlins part number 01425-21. Changing one shim in a stack alters the damping curve measurably; that is why Öhlins sells them individually rather than only as sets.
Key Features
- Outer Diameter 21 mm
- Öhlins part number 01425-21
- Inner Diameter 6 mm
- Original Öhlins service part
- Thickness 0.25 mm
What It Is
Dimensionally this is 6 mm, 21 mm, 0.25 mm, which is how it is told apart from the rest of the range. Öhlins holds thickness to hundredths of a millimetre because that is the resolution damping changes at. Öhlins stamps and grinds its shims to tolerances a general-purpose washer never holds. Face flatness matters as much as thickness — a shim that does not seal against its neighbour leaks damping.
Why the Original
Parts remain available years after a unit leaves the current price list, which is unusual in this trade. This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. The Öhlins exploded view names the number for each position; we can look it up if you do not have it. Service parts are ordered per piece unless stated otherwise.
Getting the Number Right
If the unit is already open, compare the dimensions below with the part in your hand before ordering 01425-21. inner diameter 6 mm, outer diameter 21 mm, thickness 0.25 mm is what distinguishes this number from its neighbours in the range. Öhlins holds thickness to hundredths of a millimetre because that is the resolution damping changes at. Two shims of the same thickness but different diameter give completely different curves.
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: 01425-21
- Category: Shims
- Inner Diameter: 6 mm
- Outer Diameter: 21 mm
- Thickness: 0.25 mm
- Country of Origin: Sweden
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