Progressive Suspension 444-4039B 13" Rear Shock Black Standard 444 Series

The Progressive Suspension 444-4039B is a 13-inch rear suspension shock designed for Harley-Davidson Dyna motorcycles. This premium shock represents a breakthrough in suspension technology with patented Frequency Sensing Technology (FST) that dynamically adjusts damping as you ride, delivering superior ride quality whether you're hitting small ripples or major bumps.

Key Features:

• Patented Frequency Sensing Technology (FST) automatically adjusts damping based on bump frequency for optimal comfort and control
• Progressive rate spring provides smooth compression at the top range while maintaining high performance during aggressive riding
• Deflective disc valving ensures high-level control without harshness
• Top-mount threaded preload adjuster allows hand adjustment with no special tools needed
• High-pressure gas charged for consistent, fade-free performance
• Machined billet aluminum end caps with durable black finish
• 13-inch length with 210/250 lbs/in spring rate
• Standard configuration rated for riders up to 250 lbs

The 444 Series features advanced mono-tube construction that keeps fluid less aerated and cooler compared to standard twin-tube shocks. Each shock incorporates clever internal ports that distribute oil precisely to soak up impacts of any size, ensuring an exceptionally comfortable ride. Made in USA and backed by Progressive Suspension's Lifetime Limited Warranty. Sold individually.