Öhlins Shaft 12/513 AluÖhlins Shaft 12/513 Alu
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21637-05
CategoryDamper Shafts
Diameter12 mm
Length513 mm
Country of OriginSweden
DescriptionThe whole story▼

Shaft 12/513 Alu, Öhlins part number 21637-05. A bent shaft drags in the head and destroys the seal within hours — replace, never straighten.

Key Features

  • Original Öhlins service part
  • Diameter 12 mm
  • Öhlins part number 21637-05
  • Length 513 mm

Function

Dimensionally this is 12 mm, 513 mm, which is how it is told apart from the rest of the range. The damper shaft carries the piston and passes through the seal head, so its surface finish decides how long the seals last. Öhlins offers several lengths per diameter because stroke differs by model. A shaft is threaded at both ends: one for the piston, one for the mounting.

Original Öhlins Part

Every part in this catalogue is one Öhlins fits itself during assembly and service. Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson. The exploded drawing for your unit names the number; if you do not have it, we do.

Getting the Number Right

Part number 21637-05 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. The published dimensions are diameter 12 mm, length 513 mm — measure the old part against them if you are unsure. Shaft diameter sets the displaced volume, which is why it is part of the damper's specification. A shaft is threaded at both ends: one for the piston, one for the mounting.

Fitting and Setup Service

Öhlins recommends that its units are serviced by an authorised centre. We are one: rebuild, revalve and setup all happen in our own workshop.

Specifications

  • Brand: Öhlins
  • Part Number: 21637-05
  • Category: Damper Shafts
  • Diameter: 12 mm
  • Length: 513 mm
  • Country of Origin: Sweden
07 · Support

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