Öhlins Shaft 12/453 AluÖhlins Shaft 12/453 Alu
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21637-03
CategoryDamper Shafts
Diameter12 mm
Length453 mm
Country of OriginSweden
DescriptionThe whole story▼

Shaft 12/453 Alu, Öhlins part number 21637-03. The damper shaft carries the piston through the oil and out through the seal head.

Key Features

  • Original Öhlins service part
  • Diameter 12 mm
  • Length 453 mm
  • Öhlins part number 21637-03

Where It Sits

21637-03 is the 12 mm, 453 mm version — Öhlins lists each size separately. A bent shaft drags in the head and destroys the seal within hours — replace, never straighten. The shaft is threaded at both ends: piston at one, mounting at the other. The polished section runs in the seal; a mark there ends the seal's life.

Genuine Service Part

The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. Send us the model and serial number of your unit and we will confirm the position before you order. Service parts are supplied per piece unless the description says otherwise.

Identifying the Right Part

The reliable route is the exploded drawing: find the position, read the number, order it — 21637-03 in this case. Check diameter 12 mm, length 453 mm against what you have removed; a close size is not the same part. Shafts are not shortened or extended; the length is the specification. Öhlins offers shafts in several lengths per diameter because the stroke differs by model.

Fitting and Setup Service

Fitting service parts means opening a pressurised unit. As an authorised Öhlins service centre we do that here, with the right tools and a dyno check afterwards — just ask.

Specifications

  • Brand: Öhlins
  • Part Number: 21637-03
  • Category: Damper Shafts
  • Diameter: 12 mm
  • Length: 453 mm
  • Country of Origin: Sweden
07 · Support

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