The Ohlins HD817 STX 36 Twin rear shock set is built for Harley-Davidson Dyna FXD models that use twin rear dampers. It uses a gas-pressurised damping system to maintain consistent control as conditions change. Designed as a rear twin-shock solution, it supports accurate tuning for ride quality and stability.

Ohlins | Made to race, perfected to ride

Ohlins suspension is engineered around controlled damping and clear feedback to the rider. The HD817 follows that approach with an STX 36 Twin architecture suited to Harley-Davidson twin-shock rear ends.

Who this shock is for

Ideal for Dyna FXD riders who want more disciplined damping control than standard suspension and the ability to tune the rear end to their riding style. It suits road riding where stability, traction and consistency matter.

Shock design & features

This is a gas-pressurised twin rear shock arrangement for the rear of the bike. The pressurised design helps reduce fade and supports stable damping behaviour across varying loads and road conditions.

Tuning controls

The HD817 provides rebound adjustment, allowing you to tailor how quickly the rear suspension returns after a bump or weight transfer. This helps balance comfort, grip and chassis control depending on your setup.

Before you install

  • Confirm fitment for Harley-Davidson Dyna FXD with a rear twin-shock configuration.
  • Inspect mounting hardware and bushes during installation and replace worn parts as required.
  • After installation, set sag and then fine-tune rebound to suit your load and riding conditions.
SKU HD817
Model # S36DR1
Barcode # HD817
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) 305.0
Spring Rate Standard 32.0 N/mm
Type Code S36DR1
Stroke Metal to Metal (mm) 61.0
Product Family STX 36 Twin
Fitted Spring 21180-01
Spring Colour Black

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