Öhlins Piston 12/46 shot blasted
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number03366-16
CategoryPistons
Dimension A12 mm
Dimension B46 mm
Country of OriginSweden
DescriptionThe whole story▼

Piston 12/46 shot blasted, Öhlins part number 03366-16. Piston bands are consumables — they wear against the bore and lose their seal gradually.

Key Features

  • Dimension B 46 mm
  • Dimension A 12 mm
  • Original Öhlins service part
  • Öhlins part number 03366-16

Function

The published figures are 12 mm, 46 mm. Measure the old part against them before ordering. Rebuilding a piston means keeping the shim order, because the stack is the tuning. A check valve holds pressure in one direction and opens in the other; a worn one lets damping bleed away. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact.

Genuine Service Part

Öhlins supports its suspension with individual service parts, which is why a fifteen-year-old damper can still be rebuilt to specification. Suspension is one of the few areas where the original part is genuinely the cheaper decision. Order by part number. The dimensions below are the ones Öhlins publishes for it. Order by part number — descriptions repeat across sizes, numbers do not.

Identifying the Right Part

03366-16 is the Öhlins number for this position — the same one printed in the service documentation. Öhlins states dimension a 12 mm, dimension b 46 mm for this number, and those figures are the deciding ones. Port area and shim seat geometry decide the damping curve before any adjuster is touched. 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

If you would rather not open the damper yourself, we can do it — we are an authorised Öhlins service centre and rebuild these units as a matter of routine.

Specifications

  • Brand: Öhlins
  • Part Number: 03366-16
  • Category: Pistons
  • Dimension A: 12 mm
  • Dimension B: 46 mm
  • Country of Origin: Sweden
07 · Support

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