Öhlins Fork Springs 2.8 N/mm / 430 mm / Ø 31.5 mm
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number08794-28
Spring Rate2.8 N/mm
Free Length430 mm
Inner Diameter31.5 mm
Stroke278 mm
ConstructionStraight
Packaging UnitPair
Country of OriginSweden
DescriptionThe whole story

Öhlins part number 08794-28 is a pair of fork springs rated at 2.8 N/mm, 430 mm long with a 31.5 mm inner diameter. Factory fork springs are chosen for an average rider on an average road; few riders are either.

Key Features

  • Free length 430 mm
  • Supplied as a pair
  • Measured spring rate 2.8 N/mm
  • Inner diameter 31.5 mm
  • 278 mm of usable stroke
  • Straight-wound, constant rate
  • Öhlins part number 08794-28

Why the Rate Holds

Öhlins publishes recommended sag figures for its springs, so the setup has a reference rather than a feel. The finish is applied after setting, which means the coating does not affect the rate. Shafts are hardened and surface-treated so the seal has a consistent surface to run against.

The Numbers That Matter

Free length 430 mm, inner diameter 31.5 mm, rate 2.8 N/mm — those three figures define the part completely.

Choosing 2.8 N/mm

Soft rates like this are what off-road and adventure forks need: the wheel has to follow the ground, not deflect off it. At this rate the fork sits deep in its travel under load, which is exactly what a long-travel chassis is designed around. A very soft rate uses more of the stroke, which is usually what an off-road chassis wants. Road surfaces are the hardest test of a spring rate, because the fork has to cope with both a smooth stretch and a broken one.

Applications

A workshop will pick this spring from its dimensions and the rider's weight, not from a fitment table. Öhlins offers rates in defined steps so a change can be made in one direction at a time rather than by guesswork. The safest way to choose is by static sag: set the target figure, and the rate follows from whether you can reach it with preload.

Fitting

Spring preload spacers may need adjusting to keep the installed length correct. Öhlins states an air gap for this application, and that figure is part of the setting rather than a detail. The job needs no special tools beyond a fork spring compressor and a measuring rod for the oil level.

Road Approval

Road approval: no separate certificate. The spring changes the rate, not the construction of the fork, and is treated as a service part.

Fitting and Setup Service

Fitting matters as much as the part. We are an authorised Öhlins service centre and carry out installation, servicing and setup ourselves — get in touch and we will arrange it alongside your order.

Specifications

  • Brand: Öhlins
  • Part Number: 08794-28
  • Spring Rate: 2.8 N/mm
  • Free Length: 430 mm
  • Inner Diameter: 31.5 mm
  • Stroke: 278 mm
  • Construction: Straight
  • Packaging Unit: Pair
  • Country of Origin: Sweden
FitmentWhich bikes this fits
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    08 · Paddock

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