What makes these shocks 'progressive rate'?

Progressive rate springs get stiffer as they are compressed. This means they offer a more comfortable ride over small bumps but provide increased support and control under heavier loads or during hard braking and acceleration.

How do I adjust the preload on these shocks?

The shocks feature a 5-position cam-style preload adjuster. You can rotate this cam using a suitable tool to change the spring tension, allowing you to fine-tune the ride height and stiffness based on your load and preference.

Are these shocks filled with nitrogen gas?

Yes, these shocks are high-pressure gas charged with nitrogen. This helps to prevent oil and gas from mixing, which can lead to foaming and inconsistent damping, ensuring a smoother and more reliable ride.

Progressive 412 Series Shocks 14.25in Black 412-4004B

Name: Progressive Harley 412 Series Shocks 14.25in - Black
Brand: Progressive
SKU: progressive-progressive-harley-412-series-shocks-14-25in-black-t14-613987
Price: 379.95 USD
Availability: InStock

Progressive Harley 412 Series Shocks 14.25in - Black

$379.95

In Stock

Progressive Harley 412 Series Shocks 14.25in - Black. Offers improved suspension performance with durable construction and adjustable preload.

Key Features

Fits a wide range of Harley-Davidson motorcycles.
All steel double wall damper construction for durability.
High-pressure gas charged for consistent damping performance.
Multistage velocity sensitive damping adjusts to road conditions.
Five-position cam style preload adjuster allows for ride customization.
Progressive rate springs available in black or chrome.

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Will this fit your vehicle?

Product Details

Progressive is known for making suspension components that offer a noticeable improvement over stock, and their 412 Series shocks are a prime example. These 14.25-inch black shocks are built to last and provide a smoother, more controlled ride for a wide range of Harley-Davidson motorcycles, including models like the Sportster 1200 Custom and the FXRT Sport Glide.

The doublewall steel body construction is solid, housing a nitrogen-charged damping system with multistage velocity-sensitive valving. This setup ensures consistent damping performance, whether you're cruising on the highway or navigating city streets. For fine-tuning your ride, a five-position cam-style preload adjuster lets you easily dial in the suspension to match your riding style and load, from lighter riders to heavier loads.

These shocks come with progressive rate springs, available in either black or chrome, to further customize the look and feel of your bike. They are a well-built option designed to enhance your motorcycle's handling and comfort.