The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 62091-36 |
| Spring Rate | 105 N/mm |
| Free Length | 160 mm |
| Inner Diameter | 57 mm |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 62091-36 is a shock absorber spring rated at 105 N/mm, 160 mm long with a 57 mm inner diameter. Adding a pillion or luggage changes the load enough that the standard rate stops working.
Key Features
- Inner diameter 57 mm
- Free length 160 mm
- Öhlins part number 62091-36
- Measured spring rate 105 N/mm
Why the Rate Holds
Two units carrying the same part number behave the same way out of the box, which is the whole point of testing each one. Production is Öhlins' own in Sweden, and the tolerance on the rate is what separates these from a generic replacement. Machining, anodising, assembly and testing all happen in the same building rather than across a supply chain.
The Numbers That Matter
At 160 mm free length and 57 mm inner diameter, this spring is dimensionally interchangeable with anything of the same size — the rate is what makes it a different part.
Choosing 105 N/mm
Firm rates trade some small-bump comfort for support — the right trade on a good surface at speed. If the suspension bottoms out or the geometry collapses under load, this is the direction to go. A firm rate holds the chassis attitude when the front or rear is loaded hard. A road machine spends most of its life in the first third of the fork's travel — that is the part the rate governs.
Rate and the Linkage
Preload adjusts sag within a rate; it does not change the rate, and no amount of it will rescue a spring that is wrong. Progressive springs change rate through the stroke, which suits machines with little travel and a lot of load. Öhlins sells rear springs separately precisely because rider weight varies more than machine weight does.
Applications
Öhlins offers rates in defined steps so a change can be made in one direction at a time rather than by guesswork. 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. 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.
Fitting
Fork oil should be replaced at the same time — it is already out of the leg. Both legs are done together, and both take the same rate. Öhlins states an air gap for this application, and that figure is part of the setting rather than a detail.
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: 62091-36
- Spring Rate: 105 N/mm
- Free Length: 160 mm
- Inner Diameter: 57 mm
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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