Ohlins STX 46 Street — 2018-2025 Harley-Davidson Softail Slim

The Ohlins STX 46 is a monotube shock absorber with a 46mm main piston and internal gas reservoir, engineered for Softail Slim suspension upgrades. Adjustable damping and hydraulic preload allow you to dial in handling for your riding style and weight changes.

Features

• 46mm monotube piston design
• High-pressure nitrogen gas reservoir
• Adjustable rebound damping
• Hose-mounted hydraulic preload adjustment
• Low-friction shaft and seal head
• Hard anodized CNC-machined components

Specifications

• Brand: Ohlins
• Manufacturer Part #: HD 517
• Category: Suspension / Shocks and Struts
• Weight: 10.8 lb

Fitment

Fits 2018-2025 Harley-Davidson Softail Slim models.

Frequently Asked Questions

Can I adjust the damping myself?

Yes — rebound damping is adjustable. Use the provided preload tool to adjust for weight changes and maintain proper suspension geometry.

Does this come as a single shock or a pair?

This is a single shock absorber. Verify your Softail configuration before ordering to ensure you need only one unit.

What makes the 46mm piston design better than smaller shocks?

The larger 46mm piston provides better heat dissipation and more responsive damping control for a smoother, more controlled ride.

Will this fit my 2017 Softail Slim?

This part is designed for 2018-2025 Softail Slim models. 2017 and earlier use a different shock mounting and specification.

Do I need a tuner or ECU changes with this shock?

No — this is a passive suspension component that does not require engine tuning or electronic recalibration.