Öhlins Shaft extension M13x1/M17/58
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21023-07
CategoryDamper Shafts
Diameter17 mm
Length58 mm
ThreadM13x1
Country of OriginSweden
DescriptionThe whole story▼

Shaft extension M13x1/M17/58, Öhlins part number 21023-07. Shaft diameter sets the displaced volume, which is why it is part of the damper's specification.

Key Features

  • Original Öhlins service part
  • Thread M13x1
  • Öhlins part number 21023-07
  • Diameter 17 mm
  • Length 58 mm

Where It Sits

17 mm, 58 mm: that is the whole specification, and it has to match what came out. The damper shaft carries the piston and passes through the seal head, so its surface finish decides how long the seals last. A shaft is measured by diameter and overall length, and both are specific to the unit it belongs to. This is a part that is replaced rather than repaired.

Original Öhlins Part

The part number is the contract: it defines material, dimension and finish together. This is an original Öhlins part, not an aftermarket equivalent — the tolerances are the ones the unit was assembled to. For a full rebuild, the seal kit plus the wear parts is usually the sensible order. 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 21023-07 in the exploded view for the unit it belongs to. Öhlins states diameter 17 mm, length 58 mm for this number, and those figures are the deciding ones. This is a part that is replaced rather than repaired. Adjuster shafts run inside the main shaft on units with a rod-through adjuster.

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: 21023-07
  • Category: Damper Shafts
  • Diameter: 17 mm
  • Length: 58 mm
  • Thread: M13x1
  • Country of Origin: Sweden
07 · Support

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