Progressive Suspension 444-4048C Series Heavy Duty Rear Shocks - 444 12.5 Chrome

The Progressive Suspension 444-4048C represents the pinnacle of motorcycle rear suspension technology. These premium 12.5-inch heavy-duty rear shocks feature Progressive's revolutionary Frequency Sensing Technology (FST), a breakthrough design that dynamically adjusts damping in real-time as you ride, delivering superior comfort and control across all road conditions.

Frequency Sensing Technology (FST):

Unlike conventional shocks, FST intelligently separates wheel movement from chassis movement, sensing the frequency of bumps and automatically adjusting damping characteristics. Whether you encounter small ripples or major road imperfections, these shocks distribute oil through internal ports accordingly to absorb impacts and maintain optimal ride quality.

Key Features:

• Frequency Sensing Technology (FST) for automatic damping adjustment
• Heavy-duty configuration designed for riders and bikes operating at or near maximum load rating over 50% of the time (250+ lbs rider weight)
• 12.5-inch length with chrome finish and chrome-plated progressive rate springs
• 270/315 lbs/in dual spring rate for optimal performance
• Machined billet aluminum end caps for durability and style
• Top-mount threaded preload adjuster—fine-tune with a simple twist of the cap, no special tools required
• Deflective disc valving technology
• High-pressure gas charged for consistent damping performance
• Hand-built, tuned, and dyno-tested
• Limited Lifetime Warranty

Sold as a pair. Each 444 Series shock is meticulously hand-assembled and performance-tested to ensure you receive the ultimate in ride quality and reliability. Perfect for Harley-Davidson Dyna models and other heavy-duty motorcycle applications.