Öhlins Shock Spring 19-30 N/mm / 260 mm / Ø 46 mm
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number66383-04
Spring Rate19-30 N/mm
Free Length260 mm
Inner Diameter46 mm
Stroke140 mm
ConstructionProg./Straight
FinishPowder-coated black
Country of OriginSweden
DescriptionThe whole story▼

Öhlins part number 66383-04 is a shock absorber spring rated at 19-30 N/mm, 260 mm long with a 46 mm inner diameter. A rear spring matched to rider and load keeps the chassis attitude where the factory intended it.

Key Features

  • Inner diameter 46 mm
  • Öhlins part number 66383-04
  • Free length 260 mm
  • Measured spring rate 19-30 N/mm (progressive)
  • 140 mm of usable stroke
  • Progressively wound
  • Powder-coated black

Manufacture and Tolerance

The unit is rebuildable: seals, shims and oil are catalogue items, not a reason to buy a new one. Service parts stay available for years after a part number leaves the current price list. Production is Öhlins' own in Sweden, and the tolerance on the rate is what separates these from a generic replacement.

The Numbers That Matter

At 260 mm free length and 46 mm inner diameter, this spring is dimensionally interchangeable with anything of the same size — the rate is what makes it a different part.

How a Rear Spring Works

Because the linkage is progressive on most modern machines, a small change in rate moves the sag more than riders expect. Öhlins sells rear springs separately precisely because rider weight varies more than machine weight does. A shock absorber spring carries the whole rear of the machine through a linkage that multiplies its rate several times over — which is why the number on the spring looks so much larger than a fork rate.

Applications

This spring is chosen by its dimensions rather than by motorcycle model: check inner diameter, free length and rate against the fork it is going into. Öhlins builds springs to dimensions rather than to model lists, so the question is always the same: does the diameter fit, does the length fit, and is the rate right for the rider? Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units.

Fitting

Once fitted, ride the machine before making damping changes: the new rate alters what the clicks do. A spring that is the correct length still needs the preload spacer checked, since installed length is what sets sag. Öhlins part numbers are stamped on the packaging rather than the spring, so keep the label with the setup notes.

Road Approval

Road approval: not applicable to the spring on its own. Öhlins issues approvals against complete suspension units, not individual springs.

Fitting and Setup Service

This is not a part to rush. Öhlins recommends installation by an authorised service centre, and we are an authorised Öhlins service centre — fitting, servicing and setup all happen here. Get in touch if you would like the work done with the order.

Specifications

  • Brand: Öhlins
  • Part Number: 66383-04
  • Spring Rate: 19-30 N/mm
  • Free Length: 260 mm
  • Inner Diameter: 46 mm
  • Stroke: 140 mm
  • Construction: Prog./Straight
  • Finish: Powder-coated black
  • Country of Origin: Sweden
FitmentWhich bikes this fits▼
    07 · Support

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