Öhlins STX 36 Twin Shock Absorber Harley Davidson Dyna Street Bob 103 FXDB (2006–2017) – view 2⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part NumberHD 816
FitmentHarley Davidson Dyna Street Bob 103 FXDB (2006–2017)
Road ApprovalABE (Germany)
Mounting PositionHinten
Length325 +5/-5 mm
Stroke67 mm
Spring Rate32 N/
Piston Diameter36 mm
Spring Part Number21180-01
DescriptionThe whole story▼

This is the Öhlins HD 816, released for the Harley Davidson Dyna Street Bob 103 FXDB as built between 2006 and 2017. The difference shows up in the second half of a fast road, when the standard unit has warmed through.

Key Features

  • Damper stroke 67 mm
  • 36 mm damping piston
  • Adjustable overall length for ride-height and geometry changes
  • Spring rate 32 N/mm, set against this machine's weight
  • Listed by Öhlins for the Harley Davidson Dyna Street Bob 103 FXDB (2006–2017) and no other machine
  • Monotube damper layout
  • Adjustable rebound damping via the knob above the lower eyelet
  • Öhlins length specification: 325 +5/-5 mm

Damping Performance

Öhlins supplies spring 21180-01 with this unit. 325 +5/-5 mm of adjustment turns ride height into a setting rather than a fixed dimension. 67 mm of stroke is what the Dyna Street Bob 103 FXDB's linkage allows, and the shim stack is set for exactly that. Rate as supplied is 32 N/mm, matched by Öhlins to this machine rather than to the platform. A single click produces a change most riders can detect, which is not true of every adjustable damper. Adjustment is by click rather than by feel, so a setting can be written down and returned to.

The Dyna Street Bob 103 FXDB in Particular

A 103 cc machine of this type sits in a specific weight band, and Öhlins picks the spring rate for that band rather than for the platform. Cruisers carry weight low and long, with short suspension travel doing work that a sportbike would spread over twice the stroke. Öhlins covers the 12-year production run of this generation with a single part number, which means the mounting and the linkage stayed unchanged across it.

How Öhlins Builds It

The damper body is hard-anodised aluminium, which resists both corrosion and the thermal cycling a rear shock lives with. Seals are specified for temperature stability rather than for the lowest unit cost. Materials read unremarkably on paper — aluminium, steel, nitrogen — and the difference lies in how precisely they are made.

About the STX 36 Twin Range

Both units are supplied as a matched pair with the same part number and the same valving. The STX 36 Twin replaces both sides with Öhlins units carrying a 36 mm piston, adjustable rebound and — critically for a bike that carries a pillion — a usable preload range. The 36 mm piston suits the shorter stroke and steeper mounting angle typical of a twin-shock frame.

Fitment and Compatibility

Öhlins releases HD 816 against the Harley Davidson Dyna Street Bob 103 FXDB (2006–2017). It is model-specific rather than universal: length, stroke and valving are all set for this chassis.

Road Approval

Road approval: a German ABE covers this part on the Harley Davidson Dyna Street Bob 103 FXDB. Fit it, keep the certificate with the vehicle papers, and nothing further is needed.

Specifications

  • Brand: Öhlins
  • Part Number: HD 816
  • Fitment: Harley Davidson Dyna Street Bob 103 FXDB (2006–2017)
  • Road Approval: ABE (Germany)
  • Mounting Position: Hinten
  • Length: 325 +5/-5 mm
  • Stroke: 67 mm
  • Spring Rate: 32 N/mm
  • Piston Diameter: 36 mm
  • Spring Part Number: 21180-01
FitmentWhich bikes this fits▼
  • Harley Davidson Dyna Street Bob 103 FXDB (2006–2017)
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