Öhlins STX 46 Blackline Shock Absorber BMW R NINET SCRAMBLER (2016–2020) – view 4⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandÖhlins
Part NumberBM 491
FitmentBMW R NINET SCRAMBLER (2016–2020)
Road ApprovalABE (Germany)
Mounting PositionHinten
Length374 +10 / -2 mm
Stroke53 mm
Spring Rate140 N/
Piston Diameter46 mm
Spring Part Number21102-54
DescriptionThe whole story▼

Öhlins lists part number BM 491 for one machine: the BMW R NINET SCRAMBLER built 2016–2020. The difference shows up in the second half of a fast road, when the standard unit has warmed through.

Key Features

  • Built for the BMW R NINET SCRAMBLER (2016–2020); fits without modification
  • Adjustable overall length for ride-height and geometry changes
  • Piston measuring 46 mm across
  • Öhlins fits a 140 N/mm spring to this application
  • Gas-pressurised monotube damper with the reservoir integrated into the body
  • Monotube damper layout
  • Supplied with Öhlins spring 21102-54
  • Adjustable rebound damping via the knob above the lower eyelet

About the STX 46 Blackline Range

Öhlins prices Blackline the same as the standard finish, so the choice is purely visual. Mechanically this is the STX 46 — same 46 mm piston, same monotube construction, same model-specific valving — presented in black anodising with a matching black spring. Blackline is the STX 46 with a black-anodised body and black spring rather than the familiar Öhlins gold.

Construction and Material Quality

The damper body is hard-anodised aluminium, which resists both corrosion and the thermal cycling a rear shock lives with. Öhlins manufactures in Upplands Väsby, north of Stockholm, and assembles and tests every unit there before it ships. Öhlins machines its own critical components instead of buying them in, and the tolerances are where the money goes.

Fitted to the R NINET SCRAMBLER

Heritage bikes are frequently ridden two-up, which exposes a soft standard damper immediately. Öhlins covers the 5-year production run of this generation with a single part number, which means the mounting and the linkage stayed unchanged across it.

Damping Performance

Öhlins quotes 53 mm of damper stroke for this fitment. At 46 mm the piston is large enough that the shim stack, not the orifice, decides the damping. Length is specified as 374 +10 / -2 mm, adjustable at the unit without removing it. A 140 N/mm spring comes fitted, and it is the first thing to reconsider if the rider is heavy or light. 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.

Fitment and Compatibility

Öhlins part number BM 491 is the correct number for the BMW R NINET SCRAMBLER as built 2016–2020. Öhlins lists no other machine against this number, so it is not a unit that can be adapted to a neighbouring model.

Road Approval

Road approval: ABE (Germany). The unit is covered by a German ABE for the BMW R NINET SCRAMBLER, so no individual inspection or entry in the vehicle documents is required. The approval document ships with the product.

Specifications

  • Brand: Öhlins
  • Part Number: BM 491
  • Fitment: BMW R NINET SCRAMBLER (2016–2020)
  • Road Approval: ABE (Germany)
  • Mounting Position: Hinten
  • Length: 374 +10 / -2 mm
  • Stroke: 53 mm
  • Spring Rate: 140 N/mm
  • Piston Diameter: 46 mm
  • Spring Part Number: 21102-54
FitmentWhich bikes this fits▼
  • BMW R NINET SCRAMBLER (2016–2020)
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