The Ohlins HD618 is an STX 36 twin rear shock package for Harley-Davidson FX-D and FX-DWG models, built for riders who want consistent damping control and clear chassis feedback. It uses a pressurised damping system to help maintain performance as conditions and temperatures change. Designed as a rear twin-shock setup, it’s intended to support confident road use with tunable behaviour.

Ohlins | Made to race, perfected to ride

Ohlins suspension units are engineered around controlled damping and predictable response. The focus is on stability, traction and repeatability, with adjustment range to suit different loads and riding styles.

Who this shock is for

Suited to Harley-Davidson riders running a twin-shock rear end who want more control than a basic replacement shock. A good fit for riders who value suspension feel, stability and the ability to tune the rear for their roads and pace.

Shock design & features

This is an STX 36 twin rear shock set with a gas-pressurised, oil/gas separated damping design to reduce aeration and keep damping behaviour consistent. The construction is aimed at maintaining composure through bumps and load changes while improving rear wheel control.

Tuning controls

Provides external damping adjustment for both compression and rebound, allowing you to balance support, comfort and grip. This makes it easier to tailor the rear response for different surfaces and riding priorities.

Before you install

Confirm fitment for your exact FX-D or FX-DWG variant and check clearance around exhaust and accessories typical to Harley builds. After installation, set sag and then fine-tune compression and rebound to match your load and riding conditions.

Öhlins Motorcycle Suspension Warranty

New Öhlins motorcycle shock absorbers, front forks and cartridge kits supplied by Teknik Motorsport are covered by the applicable Öhlins manufacturer’s warranty against defects in materials and workmanship.

Teknik Motorsport is an authorised Öhlins Service Centre and administers warranty claims in accordance with the Öhlins warranty conditions. The service intervals below form part of the maintenance requirements for Öhlins products supplied and supported by Teknik Motorsport.

This warranty is in addition to the consumer guarantees that apply under the Australian Consumer Law.

  • Registered motorcycles — non-competition road use Five years, subject to correct application, installation, setup and servicing every: 20,000 km or two years, whichever occurs first.
  • Registered motorcycles — adventure and light off-road use Five years, subject to correct application, spring rate, setup and servicing every: 10,000 km or annually, whichever occurs first.
  • Unregistered or competition motorcycles Two years for eligible Öhlins MX and Enduro products, subject to inspection every ten hours and servicing every: 30 operating hours or annually, whichever occurs first.

Compliance with the applicable service interval is a condition of the Öhlins manufacturer’s warranty. Evidence of servicing may be required when a warranty claim is assessed.

A seal leak, loss of damping performance or internal wear arising after the prescribed service interval has been exceeded will be treated as a service or maintenance issue rather than a manufacturing defect.

Warranty repairs

Öhlins suspension products are designed to be serviced and repaired. Where a warranty claim is approved, the normal remedy is repair of the customer’s original suspension unit using genuine Öhlins replacement parts.

Replacement of a complete shock absorber, fork or cartridge kit is not automatic and would normally occur only where the product has suffered a manufacturing failure that cannot reasonably be repaired. This is at Ohlins discretion. 

Öhlins spare parts and service kits

Öhlins spare parts, seals, bushes, service kits, springs, fluids and individual components are covered only against defects present when supplied.

No fixed age-based warranty applies to wear items, service parts or consumable components. Wear, deterioration, contamination, incorrect installation and damage caused by another component are not manufacturing defects.

Öhlins gives the customer a meaningful five-year warranty on products (Units), provided the suspension is maintained as suspension should be maintained. Teknik supports that warranty locally, can inspect the product properly, and can repair it with genuine parts rather than discarding it.

SKU HD618
Model # S36K
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 27.0 - 39.0 N/mm Progressive
Type Code S36K
Stroke Metal to Metal (mm) 66.0
Product Family STX 36 Twin
Fitted Spring 03195-07

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