Progressive Suspension 444-4001C 444 Series Rear Shocks 12.5" Chrome Standard

The Progressive Suspension 444 Series rear shocks represent a breakthrough in motorcycle suspension technology. After more than a decade of proven performance with the 440 Series, Progressive developed these premium shocks featuring patented Frequency Sensing Technology (FST) that dynamically adjusts damping as you ride for superior performance on any road surface.

Frequency Sensing Technology (FST):

The revolutionary FST system allows these shocks to automatically sense the frequency of bumps and adjust damping accordingly. Whether you're hitting small ripples or large road irregularities, the shocks distribute oil through specialized ports to absorb impacts and deliver an exceptionally comfortable ride while keeping suspension fluid cooler and less aerated than standard twin-tube designs.

Key Features:

• Patented Frequency Sensing Technology for automatic damping adjustment
• 12.5-inch length (center-of-eyelet to center-of-eyelet), chrome finish
• Standard duty configuration for riders up to 250 lbs
• Top-mount threaded preload adjuster for easy fine-tuning without special tools
• Hand-adjustable spring preload—no tools required
• Progressive rate springs for smooth ride quality with performance handling capability
• Deflective disc valve design for consistent damping control
• High-pressure gas charged for reliable, fade-free performance
• Machined billet aluminum end caps
• Hand-built, tuned, and dyno-tested in the USA
• Limited Lifetime Warranty

Sold as a pair. These shocks are ideal for Harley-Davidson touring and cruiser models. Progressive Suspension also offers Heavy Duty (250+ lbs) and Super Heavy Duty (350+ lbs for touring models) configurations to accommodate different rider weights and load conditions.