Progressive 444 Series shocks for Harley-Davidson use Frequency Sensing Technology (FST) to automatically adjust damping in real time as you ride, smoothing both small bumps and large impacts. Hand-adjustable preload and a choice of spring rates and finishes make these a tunable suspension upgrade.
Features
- Frequency Sensing Technology (FST) dynamically adjusts damping to road input
- Deflective disc valving for progressive damping curve
- Hand-adjustable spring preload — no special tools required
- Standard or heavy-duty spring rate options
- Black or chrome finish available
- Made in USA with Limited Lifetime Warranty
Specifications
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Brand: Progressive
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Manufacturer Part #: 444-4067B
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Category: Suspension / Shocks and Struts
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Weight: 7.35 lb per pair
Fitment
Fits Harley-Davidson models. Confirm your specific model year and chassis before ordering to ensure fitment compatibility.
Frequently Asked Questions
What is Frequency Sensing Technology and how does it work?
FST senses bump frequency and automatically adjusts shock damping in real time — small bumps get light damping, big hits get firm damping for a smoother overall ride.
Can I adjust the preload myself?
Yes — the top-mount threaded preload adjuster lets you fine-tune spring load by hand without special tools.
What's the difference between Standard and Heavy Duty spring rates?
Standard rate suits stock ride height and typical load. Heavy Duty is stiffer for riders who carry passengers or cargo regularly.
Are these made in the USA?
Yes — Progressive 444 shocks are manufactured in the USA and backed by a Limited Lifetime Warranty.
Do I need to respring my bike to install these?
These are a direct replacement for most Harley models. Confirm fitment with your specific year and model before ordering.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov