Öhlins O-ring 52x2 NBR70Öhlins O-ring 52x2 NBR70
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number00638-71
CategoryO-Rings
Inner Diameter52 mm
Cross Section2 mm
MaterialNBR 70
Country of OriginSweden
DescriptionThe whole story▼

O-ring 52x2 NBR70, Öhlins part number 00638-71. Seal kits gather the pieces one rebuild needs, which avoids a second order mid-job.

Key Features

  • Öhlins part number 00638-71
  • Material NBR 70
  • Cross Section 2 mm
  • Inner Diameter 52 mm
  • Original Öhlins service part

Where It Sits

The published figures are 52 mm, 2 mm, NBR 70. Measure the old part against them before ordering. Seal kits gather the pieces one rebuild needs, which avoids a second order mid-job. Size is given as inner diameter and cross-section; a close size is not a match. Seal heads combine the oil seal, the dust seal and the bushing in one assembly.

Genuine Service Part

The part number is the contract: it defines material, dimension and finish together. Öhlins manufactures service parts on the same lines as production parts — there is no second quality. For a full rebuild, the seal kit plus the wear parts is usually the sensible order. The exploded drawing for your unit names the number; if you do not have it, we do.

Getting the Number Right

Part number 00638-71 is unambiguous; the description alone is not, because Öhlins uses similar wording across sizes. Öhlins states inner diameter 52 mm, cross section 2 mm, material NBR 70 for this number, and those figures are the deciding ones. Assembly grease matters — the wrong compound swells the seal and it fails early. Seals harden with heat and age even when the machine has not been ridden much.

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: 00638-71
  • Category: O-Rings
  • Inner Diameter: 52 mm
  • Cross Section: 2 mm
  • Material: NBR 70
  • Country of Origin: Sweden
07 · Support

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08 · Paddock

Before you go.

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