The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 05677-27 |
| Spring Rate | 90 N/mm |
| Free Length | 250 mm |
| Inner Diameter | 67 mm |
| Stroke | 124 mm |
| Construction | Straight |
| Finish | Powder-coated yellow |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 05677-27 is a shock absorber spring rated at 90 N/mm, 250 mm long with a 67 mm inner diameter. A rear spring matched to rider and load keeps the chassis attitude where the factory intended it.
Key Features
- Powder-coated yellow
- Inner diameter 67 mm
- 124 mm of usable stroke
- Öhlins part number 05677-27
- Straight-wound, constant rate
- Measured spring rate 90 N/mm
- Free length 250 mm
Why the Rate Holds
Production is Öhlins' own in Sweden, and the tolerance on the rate is what separates these from a generic replacement. Öhlins publishes recommended sag figures for its springs, so the setup has a reference rather than a feel. Öhlins winds, heat-sets and then measures every spring individually — the rate on the label is the rate you get.
The Numbers That Matter
At 250 mm free length and 67 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 firm rate holds the chassis attitude when the front or rear is loaded hard. Firm rates also suit machines carrying luggage as a matter of course. This end of the range suits heavier riders, two-up use, or a machine ridden hard enough that fork dive becomes the limit. Road surfaces are the hardest test of a spring rate, because the fork has to cope with both a smooth stretch and a broken one.
What the Rear Spring Decides
On a linkage-equipped machine the wheel moves several millimetres for every millimetre the damper moves, and the spring rate has to account for that ratio. Rear spring rates run in the tens or hundreds of N/mm because the spring sits at the short end of that lever, not at the wheel. Rear spring rate sets ride height and static sag, and those two decide the chassis attitude before any damping click matters.
Applications
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. This is a service part in the proper sense — it wears, it settles, and replacing it restores what the suspension was designed to do. There is no model list for this size because the spring is a dimensional part: it fits whatever fork it physically fits.
Installation
Both legs are done together, and both take the same rate. Preload spacers usually need shortening or lengthening so the installed length stays correct. Fork oil should be replaced at the same time — it is already out of the leg.
Road Approval
Road approval: springs are not separately type-approved in Germany because they substitute a part that is already homologated with the fork. Model-specific documents, where they exist, are named above.
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: 05677-27
- Spring Rate: 90 N/mm
- Free Length: 250 mm
- Inner Diameter: 67 mm
- Stroke: 124 mm
- Construction: Straight
- Finish: Powder-coated yellow
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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