PROGRESSIVE SKU: T14-614091

Progressive 444 Series Shocks with FST - Harley-Davidson

$860.95
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About Progressive

Progressive Suspension has focused exclusively on American V-twin suspension since 1982, and its Monotube fork cartridges and 400/970/970G shock series are among the most common upgrades on baggers and Softails. For most riders the stock rear shock is the single worst part on the bike — this is the fix.

Revolutionize your Harley-Davidson's ride with Progressive 444 Series shocks, featuring patented Frequency Sensing Technology (FST). These advanced shocks dynamically adjust damping in real time, delivering a plush and controlled experience over any road condition. Enjoy superior comfort and handling without compromise.

Why riders pick this

  • Frequency Sensing Technology (FST) for dynamic damping
  • Deflective disc valving for progressive damping
  • Hand-adjustable spring preload, no special tools needed
  • Available in standard or heavy-duty spring rates
  • Choose from black or chrome finish options

The Progressive 444 Series shocks are a game-changer for Harley-Davidson riders seeking ultimate comfort and control. With their innovative Frequency Sensing Technology (FST), these shocks automatically adapt their damping to the road surface, providing a smooth response to small bumps while firming up for larger hits. This intelligent design ensures a consistently comfortable and stable ride, reducing rider fatigue on long journeys.

Intelligent Damping for Every Ride

  • Patented Frequency Sensing Technology (FST) for dynamic, real-time damping adjustment
  • Deflective disc valving creates a progressive damping curve
  • Hand-adjustable spring preload requires no special tools for tuning
  • Available in standard or heavy-duty spring rates to match your load and style
  • Choose from a sleek black or classic chrome finish

Dial In Your Perfect Suspension

Beyond its advanced FST, the Progressive 444 Series allows for easy customization to suit your specific riding needs. The hand-adjustable preload makes it simple to fine-tune your suspension for solo rides, two-up touring, or carrying extra gear. Whether you're navigating city streets or carving canyons, these shocks provide the adaptability and performance necessary to elevate your Harley-Davidson's ride quality.

Specifications

  • Brand: Progressive
  • Manufacturer Part #: 444-4001B
  • Category: Suspension / Shocks and Struts
  • Weight: 8.3 lbs
  • WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov

Common questions

How does Frequency Sensing Technology (FST) work?

FST automatically senses the frequency of bumps and adjusts the damping in real time, providing softer damping for small bumps and firmer damping for larger impacts, ensuring a consistently smooth ride.

Are these shocks adjustable for different rider weights?

Yes, the 444 Series shocks feature hand-adjustable spring preload, allowing you to easily fine-tune the suspension to accommodate different rider weights and loads without needing special tools.

Will these fit my specific Harley-Davidson model?

These shocks are available for various Harley-Davidson models. Please use our Shop by Bike tool or consult your model's specifications to confirm exact fitment and correct spring rate selection.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDProgressive
TYPEShocks and Struts
SKUT14-614091
WEIGHT8.3 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.67
67 RATINGS
5★ 52
4★ 11
3★ 2
2★ 1
1★ 1
✓ VERIFIED
Jun 6, 2025

More info in Reviews

These reviews are absolutely useless without knowing what bike you put them on, which shock you got (length in inches and Standard, HD or SD), and whether you ride solid or two-up with luggage.

— DAVID K
✓ VERIFIED
Mar 18, 2017

Incredible upgrade in ride comfort.

I got these for my 2015 Road King. Stock length. Don't need my saddlebags or floorboards dragging on the ground.

— Frank R
✓ VERIFIED
Apr 22, 2022

I am a big guy so I wasn’t sure about these shocks but after a quick conservation with the support team they said these will work. Well I got them and set them to max and it was like sitting on a brick. They had no movement in them at all. I had to soften them up half way. I am very happy with these shocks and glad to have replaced that ok’d air ride system I had on my road king. Firmest was great and install wasn’t bad either. I had a friend help me as all I had was a floor jack but we got it done in about a hour. I hope this review helps you in your decision. I went with the super duty shocks.

— Anonymous
✓ VERIFIED
Dec 15, 2019

Progressive 444 Road King

Ive only put on a hundred miles or so but they feel great. Ive heard they require a little time to soften up but theyre definitely an improvement over stock suspension. They hold the tire to the road much better over bumps. Would definitely buy again.

— Brian G
✓ VERIFIED
Apr 21, 2017

Shoild have done this long time ago

Love these shocks. Got the standards but need the Heavy duties so mine are on sale ;).

— Darrell C
✓ VERIFIED
Apr 5, 2025

Make sure your needs justify the cost of upgrade

I bought these to improve the ride on my 2017 Road Glide. If I were perfectly honest, for the money, I'm not sure that I could feel the difference. However, I did not load up the bike or try to take it through a slalom course, so I may have missed their real benefits.

— Scott M