The Ohlins HD643 STX 36 Twin shock set is built for Harley-Davidson Sportster models that need consistent rear suspension control across real-world road conditions. It uses a gas-pressurised design to help maintain stable damping behaviour during extended rides. Independent damping circuits allow you to tailor feel and response to suit your bike and load.

Ohlins | Made to race, perfected to ride

Drawing on Ohlins suspension development, the STX 36 Twin platform focuses on predictable chassis behaviour and clear feedback. The goal is repeatable control rather than harshness, supporting traction and stability as speeds and road inputs change.

Shock design & features

  • Rear twin-shock configuration for Harley-Davidson Sportster fitment
  • Gas-pressurised, oil/gas separated architecture to support consistent damping
  • STX 36 Twin product family construction

Tuning controls

  • Rebound damping adjustment
  • Compression damping adjustment
  • Spring preload adjustment

Who this shock is for

  • Sportster riders wanting more controlled rear-end behaviour under braking and cornering
  • Owners who value adjustability to suit different roads, tyres and riding style
  • Riders seeking stable damping during longer rides where heat build-up can affect feel

Before you install

  • Confirm correct fitment for your specific Sportster model and year
  • Set spring preload and damping adjusters to a sensible baseline before road testing
  • After installation, re-check fasteners and clearances through full suspension movement
SKU HD643
Model # S36PR1C1LB
Brand Ohlins
Shipping Weight 5.0000kg
Shipping Size 0.300 x 0.300 x 0.500m
Type Units
See our Shipping Information See our Frequently Asked Questions
Position (Front or Rear) Rear Twin
Shock Length Eye to Eye (mm) 336.0 +10/-0
Spring Rate Standard 16.0 - 26.0 N/mm Progressive
Type Code S36PR1C1LB
Stroke Metal to Metal (mm) 95.0
Product Family STX 36 Twin
Fitted Spring: 00380-04

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