Öhlins Preload socket M25x1/26
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21906-01
CategoryPreload Parts
Dimension A1 mm
Dimension B26 mm
ThreadM25x1
Country of OriginSweden
DescriptionThe whole story▼

Preload socket M25x1/26, Öhlins part number 21906-01. The adjuster knob is what the rider touches, and Öhlins colour-codes it by function.

Key Features

  • Original Öhlins service part
  • Thread M25x1
  • Öhlins part number 21906-01
  • Dimension B 26 mm
  • Dimension A 1 mm

Function

1 mm, 26 mm: that is the whole specification, and it has to match what came out. Öhlins publishes the click count for each unit, and a rebuilt adjuster should return it. Detent balls and springs are separate parts because they wear before the housing does. Öhlins builds click adjusters with defined detents so a setting can be written down and returned to.

Genuine Service Part

The part number is the contract: it defines material, dimension and finish together. Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. Öhlins numbers do not follow a logic you can guess — always read them from the documentation. Order by part number — descriptions repeat across sizes, numbers do not.

How to Be Sure It Fits

Order under 21906-01. Where several sizes share a description, only the number separates them. dimension a 1 mm, dimension b 26 mm is what distinguishes this number from its neighbours in the range. Adjuster housings carry seals, and a leak there empties the damper as surely as a shaft seal. Öhlins builds click adjusters with defined detents so a setting can be written down and returned to.

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: 21906-01
  • Category: Preload Parts
  • Dimension A: 1 mm
  • Dimension B: 26 mm
  • Thread: M25x1
  • Country of Origin: Sweden
07 · Support

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