The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 02215-04 |
| Spring Rate | 0.39 N/mm |
| Free Length | 46.4 mm |
| Inner Diameter | 5.85 mm |
| Stroke | 7.9 mm |
| Construction | Straight |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 02215-04 is a shock absorber spring rated at 0.39 N/mm, 46.4 mm long with a 5.85 mm inner diameter. A rear spring matched to rider and load keeps the chassis attitude where the factory intended it.
Key Features
- Öhlins part number 02215-04
- Inner diameter 5.85 mm
- Free length 46.4 mm
- Measured spring rate 0.39 N/mm
- 7.9 mm of usable stroke
- Straight-wound, constant rate
Manufacture and Tolerance
Materials read unremarkably on paper — aluminium, steel, nitrogen — and the difference lies in how precisely they are made. Each spring is set before it is measured, so it will not settle and lose rate in service. Rates are offered in defined steps, so a change can be made in one direction at a time.
Size and Rate
The 5.85 mm bore and 46.4 mm length are the two figures that decide whether it physically fits; 0.39 N/mm decides whether it suits the rider.
Where This Rate Belongs
The trade is fork dive under braking — noticeable, but rarely the limiting factor on the road. Rates in this range suit lighter riders and machines that spend their time on real roads rather than smooth circuits. A softer rate keeps the tyre loaded on a poor surface, which is worth more than outright support on most roads. Ride quality on the road is decided by rate first and damping second.
Rate and the Linkage
A spring that has settled in service sits shorter than new, which quietly lowers the bike and steepens the steering. Two riders 20 kg apart on the same motorcycle genuinely need different rates, not different clicks. A shock absorber spring carries the whole rear of the machine through a linkage that multiplies its rate several times over — which is why the number on the spring looks so much larger than a fork rate.
Applications
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. Öhlins offers rates in defined steps so a change can be made in one direction at a time rather than by guesswork. Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units.
What Fitting Involves
Once fitted, ride the machine before making damping changes: the new rate alters what the clicks do. Öhlins supplies a setting sheet with the springs; the numbers on it assume the specified oil. Work on both legs in one session so the fork stays symmetrical.
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
This is not a part to rush. Öhlins recommends installation by an authorised service centre, and we are an authorised Öhlins service centre — fitting, servicing and setup all happen here. Get in touch if you would like the work done with the order.
Specifications
- Brand: Öhlins
- Part Number: 02215-04
- Spring Rate: 0.39 N/mm
- Free Length: 46.4 mm
- Inner Diameter: 5.85 mm
- Stroke: 7.9 mm
- Construction: Straight
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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