Öhlins Shims 12/38/0.25Öhlins Shims 12/38/0.25
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number04729-03
CategoryShims
Inner Diameter12 mm
Outer Diameter38 mm
Thickness0.25 mm
Country of OriginSweden
DescriptionThe whole story▼

Shims 12/38/0.25, Öhlins part number 04729-03. Changing one shim in a stack alters the damping curve measurably; that is why Öhlins sells them individually rather than only as sets.

Key Features

  • Outer Diameter 38 mm
  • Öhlins part number 04729-03
  • Original Öhlins service part
  • Inner Diameter 12 mm
  • Thickness 0.25 mm

What It Is

At 12 mm, 38 mm, 0.25 mm it fits one position only; the next size up carries a different number. Outer diameter sets the lever the oil works against, and thickness sets the resistance. Revalving means changing the stack, not the piston — that is why shims are sold singly. The stack is the tuning: outer diameter sets where the shim bends, thickness sets how hard it resists.

Genuine Service Part

The tolerances here are the ones the unit was assembled to, not a pattern equivalent's interpretation of them. Suspension is one of the few areas where the original part is genuinely the cheaper decision. The exploded drawing for your unit names the number; if you do not have it, we do. Ask us before ordering if you are unsure: a wrong part in a pressurised unit is an expensive lesson.

Identifying the Right Part

Öhlins identifies this position by the number 04729-03 in the exploded view for the unit it belongs to. Öhlins states inner diameter 12 mm, outer diameter 38 mm, thickness 0.25 mm for this number, and those figures are the deciding ones. Revalving means changing the stack, which is why Öhlins sells shims individually. Shims are reused only if they are undamaged and flat; a coned shim is finished.

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: 04729-03
  • Category: Shims
  • Inner Diameter: 12 mm
  • Outer Diameter: 38 mm
  • Thickness: 0.25 mm
  • Country of Origin: Sweden
07 · Support

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