Progressive 444 Series shocks for Harley-Davidson use Frequency Sensing Technology (FST) to automatically adjust damping based on bump size, delivering a compliant ride over small ripples and large impacts alike. Hand-adjustable preload, available in standard or heavy-duty spring rates, with a Limited Lifetime Warranty and made in the USA.
Features
- Frequency Sensing Technology (FST) dynamically adjusts damping in real time
- 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
- Limited Lifetime Warranty
- Made in USA
Specifications
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Brand: Progressive
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Manufacturer Part #: 444-4038C
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Weight: 8.6 lb per pair
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Category: Suspension / Shocks and Struts
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Warranty: Limited Lifetime
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Country of Origin: USA
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WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Fitment
Fits Harley-Davidson models. Verify your specific model year and suspension type before ordering to ensure proper fitment.
Frequently Asked Questions
What is Frequency Sensing Technology (FST) and how does it work?
FST senses bump frequency and automatically adjusts internal damping — small bumps get soft compliance, big hits get stiffer resistance for controlled absorption.
Can I adjust the preload myself, or do I need a shop?
You adjust preload by hand with a simple twist of the threaded top cap — no special tools or shop visit required.
Do these come in different spring rates?
Yes — available in standard and heavy-duty spring rates. Choose based on your weight, cargo load, and riding preference.
What finish options are available?
Progressive 444 shocks ship in black or chrome finish to match your bike's aesthetic.
Does this come with a warranty?
Yes — Limited Lifetime Warranty covers defects in materials and workmanship.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov