The Ohlins HD503 STX 46 Custom & Heritage rear shock is designed for Harley-Davidson Softail models where ride control and comfort matter as much as the look of the bike. Built around Ohlins damping know-how, it brings modern suspension behaviour to custom and heritage-style builds without changing the character of the ride. It is intended as a direct-fit rear mono shock application for the listed Softail platforms.

Ohlins | Made to race, perfected to ride

Ohlins suspension is developed with a focus on consistent damping performance and repeatable adjustment. The Custom & Heritage STX 46 range blends that approach with finishes suited to classic and custom motorcycles.

Who this shock is for

  • Riders of Harley-Davidson Softail Breakout, Softail FXDR 114, Softail Fat Boy and Softail Sport Glide wanting improved chassis control from the rear suspension.
  • Owners building a custom or heritage-inspired bike who want premium suspension function without a modern-looking race shock aesthetic.

Shock design & features

This is an STX 46 rear mono shock with a separated oil/gas layout for stable damping behaviour over a wide range of riding conditions. The construction is aimed at maintaining damping consistency and reducing fade during longer or more demanding rides.

Tuning controls

The HD503 provides external adjustability so you can tailor feel and support to your load and riding conditions. Adjustments include rebound damping, compression damping, and spring preload.

Before you install

  • Confirm fitment for your exact Softail model and year, and check clearance around accessories and exhaust systems common on custom builds.
  • Plan to set sag and then fine-tune rebound and compression to suit your preferred balance of comfort and control.

Serviceability/lifecycle

Ohlins shocks are designed to be maintained and reconditioned, supporting long-term ownership. Periodic servicing helps keep damping performance consistent as kilometres add up.

SKU HD503
Model # S46DR1LS
Barcode # HD503
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 Mono
Shock Length Eye to Eye (mm) 318.0 +12
Spring Rate Standard 105.0 N/mm
Type Code S46DR1LS
Stroke Metal to Metal (mm) 43.0
Product Family STX 46 Custom & Heritage
Notes To raise bike 1/2" to 1" Use HD505
Fitted Spring 21102-36
Rec. Ohlins Oil 01309-

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