Harddrive Shock Extension - Softail 20mm Single — Harley-Davidson Softail Heritage Classic, Softail Fat Boy, Softail (1983-2026)

HardDrive shock extension spacer for Softail remote reservoir shocks, adding 20mm of ride height when installed between the shock body and frame mount. Allows fine-tuning of suspension geometry without replacing the entire shock assembly.

Features

• 20mm height extension
• Fits HardDrive remote reservoir shocks
• Maintains original shock adjustability
• A7075 forged aluminum construction
• CNC machined precision fit

Specifications

• Brand: HardDrive
• Manufacturer Part #: R2010042-2
• UPC: 191361228032
• Length: 4 in
• Width: 4 in
• Height: 1.5 in
• Weight: 0.3 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits Harley-Davidson Softail models equipped with HardDrive remote reservoir shocks.

Frequently Asked Questions

How much ride height does this add?

This extension adds 20mm (approximately 0.79 inches) of ride height to the rear suspension.

Can I use this with my stock Softail shocks?

No — this extension is designed specifically for HardDrive remote reservoir shock systems.

Will this affect my shock adjustability?

No — all preload, compression, and rebound adjusters on the shock remain fully functional with the extension installed.

Is installation difficult?

Installation requires removing the shock, installing the extension spacer between the shock body and frame mount, then reinstalling. Basic suspension work knowledge recommended.