Öhlins Piston 12/46 Sintered Low Friction
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number15039-03
CategoryPistons
Dimension A12 mm
Dimension B46 mm
Country of OriginSweden
DescriptionThe whole story▼

Piston 12/46 Sintered Low Friction, Öhlins part number 15039-03. Rebuilding a piston means keeping the shim order, because the stack is the tuning.

Key Features

  • Öhlins part number 15039-03
  • Original Öhlins service part
  • Dimension B 46 mm
  • Dimension A 12 mm

Where It Sits

Öhlins publishes 12 mm, 46 mm for 15039-03 — the dimensions are the identity of the part. Valves and needles set the adjustable part of the damping; the piston sets the rest. A scored piston face means oil bypasses the shims entirely. Piston bands are consumables — they wear against the bore and lose their seal gradually.

Why the Original

Buying the individual part rather than a complete assembly is what makes servicing an Öhlins unit worthwhile. Öhlins supports units that are decades old, which is why the spare parts list runs to thousands of numbers. If the unit is already apart, compare the published dimensions with the part in your hand. Send us the model and serial number of your unit and we will confirm the position before you order.

How to Be Sure It Fits

Part number 15039-03 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states dimension a 12 mm, dimension b 46 mm for this number, and those figures are the deciding ones. Rebuilding a piston means keeping the shim order, because the stack is the tuning. The piston carries the shim stacks and meters the oil; its port layout is what makes an Öhlins damper behave the way it does.

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: 15039-03
  • Category: Pistons
  • Dimension A: 12 mm
  • Dimension B: 46 mm
  • Country of Origin: Sweden
07 · Support

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