The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 06310-04 |
| Spring Rate | 40 N/mm |
| Free Length | 235 mm |
| Inner Diameter | 61 mm |
| Stroke | 140 mm |
| Construction | Straight |
| Finish | Powder-coated yellow |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 06310-04 is a shock absorber spring rated at 40 N/mm, 235 mm long with a 61 mm inner diameter. The damper can only control the spring it is given; the wrong rate makes every click a compromise.
Key Features
- Powder-coated yellow
- Öhlins part number 06310-04
- Inner diameter 61 mm
- 140 mm of usable stroke
- Straight-wound, constant rate
- Free length 235 mm
- Measured spring rate 40 N/mm
Manufacture and Tolerance
Rates are offered in defined steps, so a change can be made in one direction at a time. Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips. Each spring is set before it is measured, so it will not settle and lose rate in service.
Dimensions
At 235 mm free length and 61 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
From here it is easy to move one step in either direction once you have ridden it. This is where most riders of average weight land once static sag has been set to specification. Mid rates suit a solo rider on a road-going machine with occasional spirited use. A road machine spends most of its life in the first third of the fork's travel — that is the part the rate governs.
What the Rear Spring Decides
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. Two riders 20 kg apart on the same motorcycle genuinely need different rates, not different clicks. Because the linkage is progressive on most modern machines, a small change in rate moves the sag more than riders expect.
Applications
A spring is one of the few suspension parts that is genuinely interchangeable: same bore, same free length, and it goes in. Where Öhlins lists this size against a particular unit, the listing is a starting point rather than a boundary. This is a service part in the proper sense — it wears, it settles, and replacing it restores what the suspension was designed to do.
Fitting
The fork legs come off, the springs are swapped and the oil level is reset — half a day in most workshops. Springs are supplied ready to fit; no cutting, grinding or packing is needed. Fitting is a fork-oil job: the legs come apart, the springs go in, the oil level is set to specification.
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 recommends that its suspension is fitted by an authorised service centre. We are one, and we do the work here: installation, servicing and a proper setup. Ask us and we will include it with the order.
Specifications
- Brand: Öhlins
- Part Number: 06310-04
- Spring Rate: 40 N/mm
- Free Length: 235 mm
- Inner Diameter: 61 mm
- Stroke: 140 mm
- Construction: Straight
- Finish: Powder-coated yellow
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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