Öhlins Fork Springs 7.0 N/mm / 420 mm / Ø 38.5 mm
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part Number08424-70
Spring Rate7.0 N/mm
Free Length420 mm
Inner Diameter38.5 mm
Stroke237 mm
ConstructionTapered
Packaging UnitPair
Country of OriginSweden
DescriptionThe whole story▼

Öhlins part number 08424-70 is a pair of fork springs rated at 7.0 N/mm, 420 mm long with a 38.5 mm inner diameter. Factory fork springs are chosen for an average rider on an average road; few riders are either.

Key Features

  • Tapered-wound, constant rate
  • Supplied as a pair
  • Öhlins part number 08424-70
  • 237 mm of usable stroke
  • Free length 420 mm
  • Inner diameter 38.5 mm
  • Measured spring rate 7.0 N/mm

How Öhlins Makes Them

Every Öhlins dealer can re-valve the unit, because the shim stack is a documented, serviceable assembly. The finish is applied after setting, which means the coating does not affect the rate. Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips.

Size and Rate

Öhlins holds the free length at 420 mm and the inner diameter at 38.5 mm across this rate range, so moving up or down a rate changes nothing about the installation.

Where This Rate Belongs

A softer rate keeps the tyre loaded on a poor surface, which is worth more than outright support on most roads. Comfort and grip come from the spring moving early; this is the end of the range where that happens. This is the end of the range where small-bump compliance matters more than resistance to diving. A road machine spends most of its life in the first third of the fork's travel — that is the part the rate governs.

Applications

Rate is the variable that depends on the rider, not on the machine. Two people on the same bike may well want two different numbers. Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units. 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.

Installation

Öhlins part numbers are stamped on the packaging rather than the spring, so keep the label with the setup notes. Note the original oil level before draining — it is a useful reference even when Öhlins specifies its own. Fork oil should be replaced at the same time — it is already out of the leg.

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

Öhlins components deliver what they promise once they are fitted and set up properly. As an authorised Öhlins service centre we do exactly that in house — installation, service and setup. Simply ask if you would like us to take care of it.

Specifications

  • Brand: Öhlins
  • Part Number: 08424-70
  • Spring Rate: 7.0 N/mm
  • Free Length: 420 mm
  • Inner Diameter: 38.5 mm
  • Stroke: 237 mm
  • Construction: Tapered
  • Packaging Unit: Pair
  • Country of Origin: Sweden
FitmentWhich bikes this fits▼
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