Öhlins Cylinder head TTX39Öhlins Cylinder head TTX39
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21850-01
CategoryCylinder Heads
Country of OriginSweden
DescriptionThe whole story▼

Cylinder head TTX39, Öhlins part number 21850-01. Öhlins matches tube and piston as a pair during assembly, which is why the part numbers are specific.

Key Features

  • Öhlins part number 21850-01
  • Original Öhlins service part

What It Is

Öhlins publishes no separate dimension for this position, so the part number carries the identity. The cylinder head closes the working bore and carries the shaft seal and its bushing. Corrosion inside a tube is terminal: it cannot be honed out without changing the clearance. Reservoir tubes carry the gas charge and are built to the same standard as the working cylinder.

Original Öhlins Part

Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Öhlins publishes dimensions for its service parts so a workshop can verify before it fits. Service parts are supplied per piece unless the description says otherwise. Service parts are ordered per piece unless stated otherwise.

Identifying the Right Part

21850-01 is the Öhlins number for this position — the same one printed in the service documentation. This position has no published dimension, so the part number is the only reliable identifier. Length here is the working length, not the overall dimension, which is why two similar tubes are not interchangeable. Most seal kits are built around a specific head design.

Fitting and Setup Service

We are an authorised Öhlins service centre, so you do not have to source the tools and the nitrogen: send us the damper and we rebuild it with the correct parts and the correct setting.

Specifications

  • Brand: Öhlins
  • Part Number: 21850-01
  • Category: Cylinder Heads
  • Country of Origin: Sweden
07 · Support

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