The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 61104-81 |
| Spring Rate | 190 N/mm |
| Free Length | 130 mm |
| Inner Diameter | 57 mm |
| Stroke | 52 mm |
| Construction | Straight |
| Finish | Powder-coated yellow |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 61104-81 is a shock absorber spring rated at 190 N/mm, 130 mm long with a 57 mm inner diameter. Rear spring rate sets ride height, static sag and how much of the damper's stroke is actually usable.
Key Features
- Straight-wound, constant rate
- Measured spring rate 190 N/mm
- Öhlins part number 61104-81
- 52 mm of usable stroke
- Free length 130 mm
- Powder-coated yellow
- Inner diameter 57 mm
How Öhlins Makes Them
Seals are specified for temperature stability rather than for the lowest unit cost. The finish is applied after setting, which means the coating does not affect the rate. Shafts are hardened and surface-treated so the seal has a consistent surface to run against.
Size and Rate
At 130 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 190 N/mm
A firm rate keeps the fork high in its stroke under braking, which preserves the geometry when the front is loaded hard. Heavier riders, two-up use and track days all push the choice towards this end. If the suspension bottoms out or the geometry collapses under load, this is the direction to go. Ride quality on the road is decided by rate first and damping second.
How a Rear Spring Works
Öhlins supplies most of its shocks without a spring precisely so the rate can be matched to the rider rather than averaged. 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. Adding a pillion or luggage changes the rear load enough that the standard rate stops working properly.
Applications
Where Öhlins lists this size against a particular unit, the listing is a starting point rather than a boundary. Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units. Any workshop with the fork or shock in front of it can answer whether this spring fits — the three figures above are all it needs.
Installation
Öhlins supplies a setting sheet with the springs; the numbers on it assume the specified oil. Both legs are done together, and both take the same rate. Check the free length against the old springs before fitting — a sagged original often measures short.
Road Approval
Road approval: none is issued for springs as such — they replace an existing component of the same function. Any model-specific approval is listed under Applications.
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: 61104-81
- Spring Rate: 190 N/mm
- Free Length: 130 mm
- Inner Diameter: 57 mm
- Stroke: 52 mm
- Construction: Straight
- Finish: Powder-coated yellow
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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