Öhlins Piston band SD 20Öhlins Piston band SD 20
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21019-01
CategoryPiston Bands
Country of OriginSweden
DescriptionThe whole story▼

Piston band SD 20, Öhlins part number 21019-01. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact.

Key Features

  • Original Öhlins service part
  • Öhlins part number 21019-01

Where It Sits

This position is identified by its number rather than by a dimension. Valves and needles set the adjustable part of the damping; the piston sets the rest. A worn piston band lets oil past the outside of the piston, which shows up as damping that has gone soft. The piston band seals the piston against the bore without metal contact.

Why the Original

Öhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. Suspension is one of the few areas where the original part is genuinely the cheaper decision. Order by part number — descriptions repeat across sizes, numbers do not. We can supply the whole position from the drawing rather than the single piece if that is easier.

Getting the Number Right

Part number 21019-01 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. This position has no published dimension, so the part number is the only reliable identifier. The piston band seals the piston against the bore without metal contact. Needle geometry sets the shape of the adjustable range, not just its size.

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: 21019-01
  • Category: Piston Bands
  • Country of Origin: Sweden
07 · Support

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08 · Paddock

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