Harley Davidson Sportster [PROGRESSIVE SUSPENSION] - 412 Series Shock Absorber

PROGRESSIVE SUSPENSION 412 series shock absorbers for Harley Davidson Sportster

The shock absorbers of the 412 series from PROGRESSIVE SUSPENSION have been specially developed for use on the rear axle of the Harley Davidson Sportster. These monotube shocks with spring sleeves offer a robust construction and progressive spring characteristics that are tailored to different riding conditions.

Technical features

• Damper method: Gas filled for improved damping performance and consistent suspension.
• Spring type: Single progressive spring rate with values between 2.05 kg/mm and 2.80 kg/mm (120 lb/in to 170 lb/in), allowing graduated spring rate.
• Length (extended): 292 mm (11.50 inches), suitable for the designated mounting points on the vehicle.
• Material: High-quality steel ensures stability and durability.
• Color/Surface: Chrome-plated surface for corrosion protection and attractive appearance.
• Setting execution: Automatic adjustment that ensures constant damper performance without manual intervention.
• Mounting position: Rear wheel, with internally positioned reservoir for compact design.
• Product scope: Supplied as a pair to equip both sides of the vehicle.

Function and area of application

The 412 series shock absorbers are designed for heavy duty use. The combination of gas pressure damping and progressive spring provides reliable suspension performance that improves both comfort and control. The automatic adjustment adapts the damping to different loads without the need for manual adjustment.

Thanks to their robust construction and the use of steel, the shock absorbers are resistant to traffic stress and offer a long service life. The chrome-plated surface also provides protection against corrosion and contributes to the visual enhancement of the rear triangle.

Summary

• PROGRESSIVE SUSPENSION 412 series shock absorbers for Harley Davidson Sportster
• Gas-filled monotube dampers with progressive spring
• Automatic damping adjustment for constant performance
• Chrome plated steel construction for stability and protection
• Rear mount with internal reservoir
• Suitable for heavy duty use
• Delivered as a pair