Öhlins STX 46 rear shock for Harley-Davidson Softail M8 platform, 2018-2024. A premium suspension upgrade over the OEM single rear shock used on the post-2018 M8 Softail chassis, with significantly improved compliance and adjustability for the way these bikes actually get ridden.

Sold as a single rear shock. The 2018+ M8 Softail platform uses one rear shock — not a pair.

HD 514 fits the 2018+ M8 Softail family — including Deluxe, Low Rider, Low Rider S, Slim, and Street Bob — per Öhlins's fitment guide. Verify your specific model and year against the Öhlins catalog before ordering.

The STX 46 uses a 46mm main piston (vs the 36mm used in the Touring twin-shock line) for greater oil flow and damping authority on the heavier single-shock chassis. The hydraulic preload adjuster allows preload changes by hand — no tools needed — to accommodate rider weight changes, two-up riding, or cargo loading.

Features

• 46mm main piston for increased oil flow and damping authority
• Monotube design with internal gas reservoir in the shock body
• High-pressure nitrogen-charged
• Hydraulic spring preload adjuster (tool-free)
• Adjustable rebound damping
• Adjustable shock length for ride-height tuning
• Hard-anodized, CNC-machined components for corrosion resistance and consistent damping
• Fully serviceable and rebuildable — Öhlins services these in-house, and they are designed to be rebuilt rather than replaced over their service life.

What's Included

• One (1) Öhlins STX 46 rear shock absorber
• Pre-installed spring matched to the application

Installation Notes

• Direct bolt-on replacement for the OEM rear shock. No frame modifications required.
• Initial sag setting is recommended after install. The hydraulic preload adjuster makes ongoing adjustment straightforward.

Specifications

• Series: Öhlins STX 46
• Piston diameter: 46mm
• Damper type: Monotube, high-pressure nitrogen-charged, internal gas reservoir
• Adjustment: rebound damping, length, hydraulic preload