What is the main benefit of the 5-position preload adjuster?

The 5-position cam-style preload adjuster allows you to fine-tune the suspension's stiffness. This is useful for adjusting the ride based on rider weight, cargo, or passenger load, ensuring a more comfortable and stable ride.

What does 'progressive rate springs' mean for my ride?

Progressive rate springs offer a softer initial engagement that stiffens as they are compressed. This provides a comfortable ride over small bumps while offering more support during harder impacts or when carrying heavier loads.

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 more stable performance.

Progressive Harley 412 Series Shocks 12.0in - Black

Specifications

Brand: Progressive
Part #: 412-4050B
UPC: 412-4050B

Progressive Harley 412 Series Shocks 12.0in - Black

Name: Progressive Harley 412 Series Shocks 12.0in - Black
Brand: Progressive
Price: 379.95 USD
Availability: InStock

$379.95

On Backorder — Expected to ship by May 6, 2026

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

Progressive Harley 412 Series Shocks 12.0in - Black. Features a durable doublewall steel body and 5-position preload adjustment for a customizable ride.

Key Features

Fits a wide range of Harley-Davidson motorcycles.
Features a durable all-steel doublewall damper construction.
High-pressure gas charged for consistent damping performance.
Includes a 5-position cam-style preload adjuster for ride customization.
Equipped with progressive rate springs in a black finish.

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Will this fit your vehicle?

Product Details

Starting with a doublewall steel body construction, these Progressive 412 Series shocks are built to last. They are designed to be a solid improvement over stock suspension, offering consistent damping thanks to their nitrogen-charged, multi-stage velocity-sensitive valving. This means you get a smoother, more controlled ride whether you're cruising on the highway or navigating city streets.

These 12-inch shocks fit a wide range of Harley-Davidson models, including popular bikes like the Road King and Electra Glide. The five-position cam-style preload adjuster is a key feature here, allowing you to easily dial in your suspension. Whether you're carrying extra gear or riding with a passenger, you can adjust the preload to achieve the ride comfort and handling you prefer. The black finish and progressive rate springs offer a clean look that complements many custom builds.