What is the main advantage of the monotube design in these shocks?

The high-pressure monotube design helps maintain consistent damping performance by keeping the oil and gas separated. This means you get more reliable and predictable damping, whether you're riding on smooth pavement or rougher roads.

How do I adjust the preload and rebound on these shocks?

The preload can be adjusted by hand using the threaded spring collar. The rebound damping is also adjustable, allowing you to fine-tune how quickly the shock extends after compression to match your riding preferences.

What does the progressive rate spring do?

A progressive rate spring gets stiffer as it's compressed. This means it offers a softer initial ride for comfort over small bumps, but becomes firmer under heavier loads or larger impacts to prevent bottoming out and maintain control.

Specifications

Brand: Progressive
Part #: 494-1001
UPC: 494-1001

Progressive 06-17 Harley Dyna 494 Series Shocks 12.5in Bearing - Black

Name: Progressive 06-17 Harley Dyna 494 Series Shocks 12.5in Bearing - Black
Brand: Progressive
SKU: progressive-progressive-06-17-harley-dyna-494-series-shocks-12-5in-bearing-black-t14-790055
Price: 879.95 USD
Availability: BackOrder

$879.95

On Backorder — Expected to ship by Jul 9, 2026

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

Key Features

Fits 2006-2017 Harley Davidson Dyna models.
Features a high-pressure gas monotube design for consistent damping.
Includes deflective disc damping technology for precise control.
Adjustable rebound damping allows for fine-tuning the ride.
Hand-adjustable preload lets you set the initial spring tension.
Progressive rate coil spring adapts to varying road conditions.

These 12.5-inch shocks are designed to fit 2006-2017 Harley Davidson Dyna models. Please verify fitment for your specific motorcycle.

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About this part

Product Details

If you're looking to get more out of your 2006-2017 Harley Davidson Dyna's suspension, these Progressive 494 Series shocks are a solid option. They're built with a focus on sport performance, offering a significant step up from stock without breaking the bank. The 12.5-inch length and bearing mounting provide a direct fit for your Dyna, helping to improve handling and ride comfort.

At the core of these shocks is a high-pressure monotube design with deflective disc damping. This setup is designed to keep the damping consistent, whether you're cruising around town or pushing your bike on a track day. You can fine-tune the ride further with the hand-adjustable preload and rebound settings, allowing you to dial in the suspension to your specific needs and riding style. The progressive rate spring works with the damping to handle a variety of road conditions smoothly. Plus, an engineered jounce bumper with a built-in metal cup helps control and smooth out those moments when you might bottom out.

These shocks are also built with a lightweight aluminum body and include both standard and bearing bushings for installation flexibility. Each shock is hand-built, tuned, and dyno-tested by Progressive to ensure they perform as intended. They come with a lifetime limited warranty, giving you peace of mind with your purchase.