The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 02428-45 |
| Spring Rate | 4.5 N/mm |
| Free Length | 467 mm |
| Inner Diameter | 43.6 mm |
| Stroke | 308 mm |
| Construction | Straight |
| Packaging Unit | Pair |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 02428-45 is a pair of fork springs rated at 4.5 N/mm, 467 mm long with a 43.6 mm inner diameter. Getting the rate right restores the static sag the chassis was designed around.
Key Features
- Öhlins part number 02428-45
- Inner diameter 43.6 mm
- Supplied as a pair
- Measured spring rate 4.5 N/mm
- 308 mm of usable stroke
- Free length 467 mm
- Straight-wound, constant rate
Manufacture and Tolerance
Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips. Öhlins machines its own critical components instead of buying them in, and the tolerances are where the money goes. Every Öhlins dealer can re-valve the unit, because the shim stack is a documented, serviceable assembly.
Size and Rate
Öhlins holds the free length at 467 mm and the inner diameter at 43.6 mm across this rate range, so moving up or down a rate changes nothing about the installation.
Choosing 4.5 N/mm
Expect more sag and more movement — that is the point, not a fault. Öhlins goes this soft only where the linkage ratio or the rider weight genuinely calls for it. Rates at this end are for long travel, light riders, or machines that need the wheel to follow the ground rather than skip over it. 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
Where Öhlins lists this size against a particular unit, the listing is a starting point rather than a boundary. Ask us with the machine and rider weight and we will tell you which rate in this size to take. This is a service part in the proper sense — it wears, it settles, and replacing it restores what the suspension was designed to do.
Installation
A spring that is the correct length still needs the preload spacer checked, since installed length is what sets sag. Öhlins states the oil and the air-gap for this application — both are part of the setting, not a detail. Rate and preload are separate adjustments: get the rate right first, then set sag with preload.
Road Approval
Road approval: not applicable to the spring on its own. Öhlins issues approvals against complete suspension units, not individual springs.
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: 02428-45
- Spring Rate: 4.5 N/mm
- Free Length: 467 mm
- Inner Diameter: 43.6 mm
- Stroke: 308 mm
- Construction: Straight
- Packaging Unit: Pair
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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