Öhlins Fork Springs 12.0 N/mm / 260 mm / Ø 25.5 mm
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number08790-12
Spring Rate12.0 N/mm
Free Length260 mm
Inner Diameter25.5 mm
Stroke137 mm
ConstructionStraight
Packaging UnitPair
Country of OriginSweden
DescriptionThe whole story

Öhlins part number 08790-12 is a pair of fork springs rated at 12.0 N/mm, 260 mm long with a 25.5 mm inner diameter. A fork that is sprung wrong uses up its travel before the damping has a chance to work.

Key Features

  • Measured spring rate 12.0 N/mm
  • Öhlins part number 08790-12
  • 137 mm of usable stroke
  • Supplied as a pair
  • Free length 260 mm
  • Straight-wound, constant rate
  • Inner diameter 25.5 mm

How Öhlins Makes Them

Production has stayed in Sweden since the company was founded in 1976. The Öhlins part number is stamped on the unit, so its specification can be looked up years later. Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips.

Size and Rate

The 25.5 mm bore and 260 mm length are the two figures that decide whether it physically fits; 12.0 N/mm decides whether it suits the rider.

What This Rate Does

This is the stiff end of the catalogue — chosen when collapse under load, not grip, is the limit. Very firm rates keep the chassis attitude stable when the brakes are used at their limit, at the cost of ride comfort. Öhlins offers rates this high only where the application genuinely needs them. Ride quality on the road is decided by rate first and damping second.

Applications

Where Öhlins lists this size against a particular unit, the listing is a starting point rather than a boundary. A spring is one of the few suspension parts that is genuinely interchangeable: same bore, same free length, and it goes in. Rather than a model list, use the measurements: a fork that accepts this diameter and length is a candidate, and the rate follows from rider weight.

Fitting

Fitting is a fork-oil job: the legs come apart, the springs go in, the oil level is set to specification. Öhlins states an air gap for this application, and that figure is part of the setting rather than a detail. A spring that is the correct length still needs the preload spacer checked, since installed length is what sets sag.

Road Approval

Road approval: springs are not separately type-approved in Germany because they substitute a part that is already homologated with the fork. Model-specific documents, where they exist, are named above.

Fitting and Setup Service

Öhlins recommends that its suspension is fitted by an authorised service centre. We are one, and we do the work here: installation, servicing and a proper setup. Ask us and we will include it with the order.

Specifications

  • Brand: Öhlins
  • Part Number: 08790-12
  • Spring Rate: 12.0 N/mm
  • Free Length: 260 mm
  • Inner Diameter: 25.5 mm
  • Stroke: 137 mm
  • Construction: Straight
  • Packaging Unit: Pair
  • Country of Origin: Sweden
FitmentWhich bikes this fits
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