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.
Transform your Harley-Davidson's ride with Progressive 444 Series shocks, featuring Frequency Sensing Technology (FST). These advanced shocks dynamically adjust damping in real time, delivering a smooth and controlled ride over any road condition.
Why riders pick this
Frequency Sensing Technology (FST) for dynamic damping
Deflective disc valving for progressive damping
Hand-adjustable spring preload without special tools
Available in Standard or Heavy Duty rates
Show-quality chrome finish
Made in USA with a Limited Lifetime Warranty
The Progressive 444 shocks with FST ensure optimal oil distribution, allowing them to automatically adapt to both minor road imperfections and significant impacts for consistent performance. With hand-adjustable spring preload, you can effortlessly fine-tune your suspension without the need for special tools, ensuring your V-twin is always set up for your preferred comfort and handling.
Responsive Damping for Ultimate Comfort
Frequency Sensing Technology (FST) for real-time damping adjustment
Deflective disc valving creates a progressive damping curve
Hand-adjustable spring preload, no special tools required
Available in standard or heavy duty spring rates
Brilliant chrome finish for a classic custom look
Premium Performance, American Made
Proudly made in the USA, these 444 shocks offer a blend of cutting-edge technology and durable construction. The chrome finish adds a touch of classic style to your bike, while the advanced damping and easy adjustability provide a noticeable improvement in ride quality and control. Upgrade your Harley-Davidson with confidence, knowing you're getting a premium suspension component designed for the demands of the open road.
Specifications
Brand: Progressive
Manufacturer Part #: 444-4021C
Category: Suspension / Shocks and Struts
Weight: 8.85 lb per shock
WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov
Common questions
What is Frequency Sensing Technology (FST) and how does it improve my ride?
FST allows the shocks to sense bump frequency and automatically adjust damping in real time. This means the shocks provide optimal control and comfort by reacting differently to varying road conditions, from small ripples to large impacts.
Do I need special tools to adjust these shocks?
No, the spring preload on these Progressive 444 shocks is hand-adjustable, allowing for easy tuning without the need for any specialized tools.
How do I confirm these shocks fit my specific Harley-Davidson model?
Progressive manufactures the 444 series in multiple configurations for various Harley-Davidson chassis types. Please confirm compatibility using our Shop by Bike tool or by contacting our technical support with your specific year and model before placing your order.
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.
BRAND
Progressive
TYPE
Shocks and Struts
SKU
T14-669227
WEIGHT
8.85 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
YOU MAY ALSO LIKE
CUSTOMER REVIEWS
3
1 RATING
5★0
4★0
3★1
2★0
1★0
WRITE A REVIEW
YOUR RATING
✓ Thank you! Your review has been submitted and is pending approval.
✓ VERIFIED
Dec 25, 2025
Stiff
The shocks seem super nice, but they are incredibly stiff. Turns out they’re 130/200 top to bottom. Would be nice to have an option to choose your spring rate. Couldn’t find it in the description either. Have them installed on a 1998 sportster 1200 by the way. I’m about 180lbs and they don’t move at all, my friend who weighs about 260 also said they were way to firm. Hope this helps.
Progressive 444 FST Shocks Chrome...
$860.95
BUILT FOR BAGGERS
SAVE 10% OFF YOUR FIRST ORDER
Drop your email — we'll send a one-time discount code + early access to drops, builds, and KOTB-spec gear.
First-time customers only · One use per customer · Some exclusions apply