Progressive 444 Series shocks for Harley-Davidson use patented Frequency Sensing Technology (FST) to dynamically adjust damping in real time as you ride over bumps of any size. Hand-adjustable preload and deflective disc valving deliver a smooth, tunable ride without special tools.
Features
- Frequency Sensing Technology (FST) automatically adjusts damping based on bump frequency
- Deflective disc valving for progressive damping curve
- Hand-adjustable spring preload — no tools required
- Available in standard or heavy duty spring rates
- Black or chrome finish options
- Made in USA with Limited Lifetime Warranty
Specifications
-
Brand: Progressive
-
Manufacturer Part #: 444-4067C
-
Weight: 7.3 lb per pair
-
Category: Suspension / Shocks and Struts
-
WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Fitment
Fits Harley-Davidson models. Verify your specific year and model compatibility before ordering, as shock fitment varies across platforms.
Frequently Asked Questions
How does Frequency Sensing Technology work?
FST senses the speed at which bumps hit the suspension and automatically routes oil through internal ports to adjust damping — small bumps get softer response, big impacts get stiffer resistance.
Can I adjust the preload without a special tool?
Yes — the top-mount threaded adjuster twists by hand. No tools needed to dial in your preferred ride height and firmness.
What finish options are available?
Progressive 444 shocks come in black or chrome finish, both paired with standard or heavy duty spring rates.
Is there a warranty?
Yes — Limited Lifetime Warranty on manufacturing defects. Made in the USA.
Do I need new mounting hardware?
Check your Harley's existing mounting points. Most stock Harley rear frames accept 444 shocks directly, but verify bolt spacing with Progressive before order confirmation.
California Proposition 65 Warning
WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov