Öhlins Adaptor base valve M10x1/36
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number21758-05
CategoryValves
Dimension A1 mm
Dimension B36 mm
ThreadM10x1
Country of OriginSweden
DescriptionThe whole story▼

Adaptor base valve M10x1/36, Öhlins part number 21758-05. Port area and shim seat geometry decide the damping curve before any adjuster is touched.

Key Features

  • Dimension A 1 mm
  • Original Öhlins service part
  • Dimension B 36 mm
  • Thread M10x1
  • Öhlins part number 21758-05

Where It Sits

This one measures 1 mm, 36 mm, and those figures are what separate it from the neighbouring numbers. Öhlins uses a piston band rather than metal-to-metal contact, which is what keeps the bore intact. Öhlins machines its pistons rather than sintering them, which is why the port edges stay sharp. Valves and needles set the adjustable part of the damping; the piston sets the rest.

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. Öhlins lists this part under its own number in the service catalogue so a workshop can order exactly what it needs. The exploded drawing for your unit names the number; if you do not have it, we do. Order by part number. The dimensions below are the ones Öhlins publishes for it.

Identifying the Right Part

Order under 21758-05. Where several sizes share a description, only the number separates them. dimension a 1 mm, dimension b 36 mm is what distinguishes this number from its neighbours in the range. Needle geometry sets the shape of the adjustable range, not just its size. Jets meter fixed bleed flow and are sized in tenths of a millimetre.

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: 21758-05
  • Category: Valves
  • Dimension A: 1 mm
  • Dimension B: 36 mm
  • Thread: M10x1
  • Country of Origin: Sweden
07 · Support

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