The facts.
| Brand | Öhlins |
|---|---|
| Part Number | 66419-030 |
| Spring Rate | 30 N/mm |
| Free Length | 190 mm |
| Inner Diameter | 46 mm |
| Stroke | 110 mm |
| Construction | Straight |
| Finish | Powder-coated black |
| Country of Origin | Sweden |
DescriptionThe whole story▼
Öhlins part number 66419-030 is a shock absorber spring rated at 30 N/mm, 190 mm long with a 46 mm inner diameter. Adding a pillion or luggage changes the load enough that the standard rate stops working.
Key Features
- 110 mm of usable stroke
- Measured spring rate 30 N/mm
- Free length 190 mm
- Öhlins part number 66419-030
- Inner diameter 46 mm
- Straight-wound, constant rate
- Powder-coated black
How Öhlins Makes Them
Öhlins winds, heat-sets and then measures every spring individually — the rate on the label is the rate you get. Shafts are hardened and surface-treated so the seal has a consistent surface to run against. Every unit is dyno-tested against the curve held for its part number, not sampled from a batch.
Dimensions
The 46 mm bore and 190 mm length are the two figures that decide whether it physically fits; 30 N/mm decides whether it suits the rider.
Choosing 30 N/mm
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. On a machine ridden solo and mostly on the road, softer is often the honest choice. 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
Static sag at the rear sets the whole chassis attitude — get it wrong and the front geometry goes with it. 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. A rear spring is the cheapest part of the suspension and the one that decides the most.
Applications
Öhlins builds springs to dimensions rather than to model lists, so the question is always the same: does the diameter fit, does the length fit, and is the rate right for the rider? Sag figures, not feel, decide whether a rate is right. Öhlins publishes the targets for its own units. A spring is one of the few suspension parts that is genuinely interchangeable: same bore, same free length, and it goes in.
Installation
Set static sag after fitting; the rate is only right if the sag figure lands where Öhlins specifies. Springs are supplied ready to fit; no cutting, grinding or packing is needed. Spring preload spacers may need adjusting to keep the installed length correct.
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
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: 66419-030
- Spring Rate: 30 N/mm
- Free Length: 190 mm
- Inner Diameter: 46 mm
- Stroke: 110 mm
- Construction: Straight
- Finish: Powder-coated black
- Country of Origin: Sweden
FitmentWhich bikes this fits▼
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