Öhlins Fork Springs 13.0 N/mm / 260 mm / Ø 25.5 mm
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number08790-13
Spring Rate13.0 N/mm
Free Length260 mm
Inner Diameter25.5 mm
Stroke136 mm
ConstructionStraight
Packaging UnitPair
Country of OriginSweden
DescriptionThe whole story

Öhlins part number 08790-13 is a pair of fork springs rated at 13.0 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

  • Straight-wound, constant rate
  • Measured spring rate 13.0 N/mm
  • Supplied as a pair
  • Öhlins part number 08790-13
  • Free length 260 mm
  • 136 mm of usable stroke
  • Inner diameter 25.5 mm

How Öhlins Makes Them

The unit is rebuildable: seals, shims and oil are catalogue items, not a reason to buy a new one. Each spring is set before it is measured, so it will not settle and lose rate in service. Öhlins sets a baseline for each part number on the machine it was developed on, so it works before anything is adjusted.

Dimensions

Free length 260 mm, inner diameter 25.5 mm, rate 13.0 N/mm — those three figures define the part completely.

Where This Rate Belongs

A rate this high is track territory or for a heavy rider: it stops the fork collapsing under sustained heavy braking. Very firm rates keep the geometry stable but ask the damping to work harder over small inputs. Heavy riders in full kit, or machines carrying substantial load, are the other case. Ride quality on the road is decided by rate first and damping second.

Applications

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. Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units. 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.

Installation

Öhlins part numbers are stamped on the packaging rather than the spring, so keep the label with the setup notes. Work on both legs in one session so the fork stays symmetrical. Both legs are done together, and both take the same rate.

Road Approval

Road approval: a spring is a like-for-like replacement of a wear part and carries no separate type approval. Where Öhlins states an approval for a particular motorcycle, it is named under Applications.

Fitting and Setup Service

We are an authorised Öhlins service centre, so the installation does not have to be your problem: we fit and set up Öhlins components in our own workshop. Ask us when you order and we will include the work.

Specifications

  • Brand: Öhlins
  • Part Number: 08790-13
  • Spring Rate: 13.0 N/mm
  • Free Length: 260 mm
  • Inner Diameter: 25.5 mm
  • Stroke: 136 mm
  • Construction: Straight
  • Packaging Unit: Pair
  • Country of Origin: Sweden
FitmentWhich bikes this fits
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