Öhlins STX 36 Twin Shock Absorber Harley Davidson Dyna Low Rider FXDL (2015–2016) – HD 817⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part NumberHD 817
FitmentHarley Davidson Dyna Low Rider FXDL (2015–2016)
Road ApprovalABE (Germany)
Length305 mm
Stroke61 mm
Spring Rate32 N/
Piston Diameter36 mm
Spring Part Number21180-01
Product LineSTX 36 Twin
DescriptionThe whole story▼

This is the Öhlins HD 817, released for the Harley Davidson Dyna Low Rider FXDL as built between 2015 and 2016. The unit it replaces was chosen when the Dyna Low Rider FXDL was costed, not when it was developed.

Key Features

  • 36 mm piston diameter
  • Adjustable rebound damping via the knob above the lower eyelet
  • Spring rate 32 N/mm, set against this machine's weight
  • Supplied with Öhlins spring 21180-01
  • Listed by Öhlins for the Harley Davidson Dyna Low Rider FXDL (2015–2016) and no other machine
  • Monotube damper layout
  • Built to 305 mm installed length
  • 61 mm of damper stroke

How It Behaves on the Road

Spring part number 21180-01 is a separate catalogue item, so a rate change is inexpensive. The available stroke of 61 mm sets how much wheel travel the shim stack has to control. The unit measures 305 mm installed, which is the dimension the Dyna Low Rider FXDL's linkage expects. The 36 mm piston is the same size Öhlins uses across this platform, and the shim stack is what makes it model-specific. Öhlins publishes a baseline setting for each part number, which is the sensible starting point. A single click produces a change most riders can detect, which is not true of every adjustable damper.

The Dyna Low Rider FXDL in Particular

Short travel and substantial mass are a hard combination: there is little room to absorb anything, so damping quality matters more.

About the STX 36 Twin Range

Twin-shock machines share the load between two units, and that changes everything about how each one is specified: half the load, but also half the leverage and often a steeper mounting angle. Preload is set by a threaded collar on each side, and both sides must be set equally. Rebound adjustment is at the lower eyelet on most numbers in this range.

Materials and Manufacture

The unit is rebuildable: seals, shims and oil are catalogue items, not a reason to buy a new one. Anodising is hard-coat rather than decorative, which matters on a component exposed to road salt and stone chips. The damper body is hard-anodised aluminium, which resists both corrosion and the thermal cycling a rear shock lives with.

Fitment and Compatibility

The fitment stated here is the Harley Davidson Dyna Low Rider FXDL in its 2015–2016 form, under Öhlins part number HD 817. Nothing about it is generic — the mounting dimensions alone rule out a different model.

Road Approval

Road approval: ABE (Germany). The unit is covered by a German ABE for the Harley Davidson Dyna Low Rider FXDL, so no individual inspection or entry in the vehicle documents is required. The approval document ships with the product.

Specifications

  • Brand: Öhlins
  • Part Number: HD 817
  • Fitment: Harley Davidson Dyna Low Rider FXDL (2015–2016)
  • Road Approval: ABE (Germany)
  • Length: 305 mm
  • Stroke: 61 mm
  • Spring Rate: 32 N/mm
  • Piston Diameter: 36 mm
  • Spring Part Number: 21180-01
  • Product Line: STX 36 Twin
FitmentWhich bikes this fits▼
  • Harley Davidson Dyna Low Rider FXDL (2015–2016)
07 · Support

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08 · Paddock

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