The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 08429-80 |
| Spring Rate | 8.0 N/mm |
| Free Length | 270 mm |
| Inner Diameter | 23.5 mm |
| Stroke | 152 mm |
| Construction | Straight |
| Packaging Unit | Pair |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 08429-80 is a pair of fork springs rated at 8.0 N/mm, 270 mm long with a 23.5 mm inner diameter. Too stiff and the front loses feel over bumps; too soft and it dives under the brakes. Rate sets that balance.
Key Features
- Straight-wound, constant rate
- Inner diameter 23.5 mm
- Supplied as a pair
- Free length 270 mm
- Öhlins part number 08429-80
- Measured spring rate 8.0 N/mm
- 152 mm of usable stroke
How Öhlins Makes Them
Two units carrying the same part number behave the same way out of the box, which is the whole point of testing each one. Service parts stay available for years after a part number leaves the current price list. Rates are offered in defined steps, so a change can be made in one direction at a time.
The Numbers That Matter
At 270 mm free length and 23.5 mm inner diameter, this spring is dimensionally interchangeable with anything of the same size — the rate is what makes it a different part.
Where This Rate Belongs
A middle rate balances support against compliance, which is why Öhlins uses it as the baseline. Rates here suit a solo rider of typical weight on a road-going machine. This is the middle of Öhlins' range — the rate most riders of average weight end up on once sag is set properly. 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. 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. 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.
What Fitting Involves
Rate and preload are separate adjustments: get the rate right first, then set sag with preload. Torque the fork caps to the manufacturer's figure; the springs change nothing about the assembly torque. Check the free length against the old springs before fitting — a sagged original often measures short.
Road Approval
Road approval: none is issued for springs as such — they replace an existing component of the same function. Any model-specific approval is listed 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: 08429-80
- Spring Rate: 8.0 N/mm
- Free Length: 270 mm
- Inner Diameter: 23.5 mm
- Stroke: 152 mm
- Construction: Straight
- Packaging Unit: Pair
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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