What does Frequency Sensing Technology (FST) do?

Frequency Sensing Technology allows the shocks to automatically adjust their damping based on the frequency of bumps. This means they can better absorb both small road imperfections and larger impacts for a more comfortable and controlled ride.

Can I adjust the spring preload on these shocks?

Yes, these shocks feature a top-mounted threaded preload adjuster. You can easily fine-tune the spring preload by hand without the need for any special tools.

What is the difference between standard and heavy-duty spring rates?

The standard weight spring rate is suitable for most riders, while the heavy-duty option is recommended for riders weighing 250 lbs or more. Choosing the correct spring rate helps ensure optimal performance and comfort for your specific needs.

Progressive 444 Series Shocks 11.5in Chrome 444-4066C

Name: Progressive Harley 444 Series Shocks 11.5in - Chrome
Brand: Progressive
Price: 860.95 USD
Availability: InStock

Progressive Harley 444 Series Shocks 11.5in - Chrome

$860.95

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Progressive Harley 444 Series Shocks 11.5in - Chrome. Features Frequency Sensing Technology for an improved ride.

Key Features

Fits select Harley-Davidson Sportster models.
Features patented Frequency Sensing Technology (FST) for automatic damping adjustment.
Progressive rate spring offers improved ride feel.
Top mount threaded preload adjuster allows for tool-free fine-tuning.
Deflective disc valving contributes to controlled damping.
Available in standard or heavy-duty spring rates.

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Will this fit your vehicle?

Product Details

The patented Frequency Sensing Technology (FST) in these Progressive 444 Series shocks is a notable design choice. It means the shocks can automatically adjust their damping based on the frequency of bumps encountered on the road. This advanced system works by distributing oil through specific ports as needed, effectively soaking up both small and large impacts for a more comfortable ride. These shocks are designed to fit a range of Harley-Davidson Sportster models, including popular choices like the XL1200X Forty-Eight and the XL883N Iron 883.

Beyond the FST, these 11.5-inch chrome shocks also feature a progressive rate spring, which offers a more consistent feel as the suspension compresses. You can fine-tune your ride using the top-mounted threaded preload adjuster, which lets you make adjustments by hand without needing special tools. They also include a deflective disc valving system for improved damping control. These shocks are well-built in the USA and come with a limited lifetime warranty, giving you confidence in their durability.

When ordering, you can select between standard weight and heavy-duty spring rates, depending on your riding needs, with the heavy-duty option recommended for riders over 250 lbs. These shocks are a solid option for riders looking to significantly improve their Sportster's handling and comfort.