Progressive 444 Series shocks for Harley-Davidson use patented Frequency Sensing Technology (FST) to automatically adjust damping in real time based on bump intensity—small ripples and big hits get different oil flow for a consistently composed ride. Hand-adjustable preload, available in standard or heavy-duty spring rates, with a limited lifetime warranty and USA manufacturing.
Features
- Frequency Sensing Technology (FST) dynamically adjusts damping based on bump frequency
- Deflective disc valving
- Progressive-rate spring
- Hand-adjustable preload — no special tools needed
- Standard or heavy-duty spring rate options
- Black or chrome finish available
Specifications
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Brand: Progressive
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Manufacturer Part #: 444-4036B
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Weight: 8.2 lb
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Category: Suspension / Shocks and Struts
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Warranty: Limited Lifetime Warranty
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Country of Origin: USA
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Prop 65 Warning: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Fitment
Fits Harley-Davidson. Verify specific year and model compatibility with Progressive's fitment chart before ordering, as shock length and mounting points vary across model lines.
Frequently Asked Questions
What is Frequency Sensing Technology (FST)?
FST automatically senses bump frequency and adjusts damping in real time — small bumps and large impacts get different oil flow for optimal comfort at any speed.
Do I need special tools to adjust preload?
No — the top-mount threaded adjuster can be twisted by hand for fine-tuning without tools.
Can I choose between standard and heavy-duty springs?
Yes — 444 Series shocks are available in both standard and heavy-duty spring rates. Select based on your typical load and riding style.
Is there a warranty?
Yes — Progressive backs these with a limited lifetime warranty and manufactures them in the USA.
Does this fit my specific Harley model and year?
These fit Harley-Davidson, but fitment varies by model and year. Check Progressive's fitment guide or confirm the part number matches your bike before ordering.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov