Öhlins Cylinder head TTX36Öhlins Cylinder head TTX36
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21897-02
CategoryCylinder Heads
Country of OriginSweden
DescriptionThe whole story▼

Cylinder head TTX36, Öhlins part number 21897-02. The tube is what the whole damper is built around: everything else references its bore.

Key Features

  • Öhlins part number 21897-02
  • Original Öhlins service part

Function

There is no measurement to check here — the number and the exploded view identify it. Wall thickness and bore finish are what let a cylinder hold pressure without deforming under load. The cylinder is one of the few damper parts that is genuinely wear-limited. The tube carries the end cap threads, so damaged threads mean a new tube rather than a repair.

Why the Original

Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. 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. Order by part number — descriptions repeat across sizes, numbers do not.

Getting the Number Right

If the unit is already open, compare the dimensions below with the part in your hand before ordering 21897-02. Öhlins does not publish a dimension here — go by the number and the exploded view. Öhlins machines the head so the bushing bore is concentric with the seal — otherwise the shaft wears one side. A scored bore means lost damping, because the oil bypasses the piston rather than being forced through the shims.

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: 21897-02
  • Category: Cylinder Heads
  • Country of Origin: Sweden
07 · Support

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08 · Paddock

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