What is the main benefit of progressive rate springs?

Progressive rate springs offer a more comfortable ride by providing a softer initial response to small bumps and road imperfections. As the suspension compresses further under load or larger impacts, the spring rate increases, offering better support and preventing bottoming out.

How do I adjust the preload on these shocks?

These shocks feature a five-position cam-style preload adjuster. You'll typically use a spanner wrench or similar tool to rotate the cam mechanism to select your desired preload setting, which affects how the spring is compressed.

What is the difference between Standard and Heavy-Duty springs?

While not specified for this exact part number, Heavy-Duty springs are generally designed for riders who carry heavier loads, frequently ride with a passenger, or prefer a firmer suspension feel. Standard springs are typically suited for average rider weights and solo riding.

Progressive 412 Series Shocks 12.0in Chrome 412-4238C

Name: Progressive Cruiser 412 Series Shocks 12.0in - Chrome
Brand: Progressive
Price: 379.95 USD
Availability: InStock

Progressive Cruiser 412 Series Shocks 12.0in - Chrome

$379.95

On Backorder — Expected to ship by Mar 29, 2026

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

Progressive Cruiser 412 Series Shocks 12.0in - Chrome

Key Features

Fits a wide range of cruiser motorcycles including Yamaha Virago, Honda Shadow, and Suzuki Intruder models.
All steel, double-wall damper construction for durability.
Nitrogen-charged, multi-stage velocity-sensitive valving for consistent damping performance.
Progressive rate springs offer an improved ride quality across various conditions.
Chrome finish for a classic cruiser look.
Five-position cam-style preload adjuster allows for easy ride tuning.

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Will this fit your vehicle?

Product Details

If you're looking to improve the ride and handling on your cruiser, these Progressive 412 Series shocks are a solid option. Designed to replace stock units on a wide range of motorcycles, they offer a noticeable upgrade in comfort and control. You'll find these on popular models like the Yamaha V-Max, Suzuki Intruder, and Kawasaki Vulcan, among many others.

These shocks feature a durable, double-wall steel body construction that's built to last. Inside, they use nitrogen-charged, multi-stage valving that helps deliver consistent damping, whether you're cruising down the highway or navigating bumpy roads. The progressive rate springs are designed to provide a smoother ride by offering a softer initial feel that stiffens as the suspension compresses, adapting to different loads. Plus, the five-position cam-style preload adjuster lets you easily fine-tune the suspension to match your riding style and load, from a lighter rider to a heavier setup.

This particular set comes in a bright chrome finish that looks great on many custom and stock bikes. They are 12 inches long, which is a common length for many cruiser applications, but it's always a good idea to measure your stock shocks to confirm fitment before ordering.