Öhlins Piston band soft solid 8/36
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21018-05
CategoryPiston Bands
Dimension A8 mm
Dimension B36 mm
Country of OriginSweden
DescriptionThe whole story▼

Piston band soft solid 8/36, Öhlins part number 21018-05. Rebuilding a piston means keeping the shim order, because the stack is the tuning.

Key Features

  • Original Öhlins service part
  • Dimension B 36 mm
  • Öhlins part number 21018-05
  • Dimension A 8 mm

Function

Öhlins publishes 8 mm, 36 mm for 21018-05 — the dimensions are the identity of the part. Port area and shim seat geometry decide the damping curve before any adjuster is touched. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact. Replacing a piston is a workshop job because the shim stack has to be rebuilt in the correct order.

Why the Original

Öhlins numbers every position so a workshop can order precisely what it needs, not a whole assembly. This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. 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. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson.

Getting the Number Right

Öhlins identifies this position by the number 21018-05 in the exploded view for the unit it belongs to. The published dimensions are dimension a 8 mm, dimension b 36 mm — measure the old part against them if you are unsure. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp. Replacing a piston is a workshop job because the shim stack has to be rebuilt in the correct order.

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: 21018-05
  • Category: Piston Bands
  • Dimension A: 8 mm
  • Dimension B: 36 mm
  • Country of Origin: Sweden
07 · Support

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08 · Paddock

Before you go.

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