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The Progressive Suspension 412 Series Shock provides a reliable upgrade for Harley-Davidson FL and FX models, offering enhanced ride quality and handling. Crafted with a simple yet durable design, these shocks are an affordable way to improve your motorcycle's suspension performance without sacrificing style. Featuring a five-position cam-style spring preload adjuster, riders can easily dial in the ride height to match personal preferences or riding conditions, ensuring optimal comfort and control. The shocks are available in a range of styles, including full show-chrome or black covers, and either chrome or black springs and end caps, allowing customization to suit your bike's aesthetic.
The 412 series shocks are made in the USA and measure from center-of-eyelet to center-of-eyelet, ensuring straightforward installation on compatible Harley models. When installing on '86-'15 XL models, some modifications to the chain or belt guard may be necessary to provide proper clearance. The design includes options that are slightly longer or shorter than stock, which can subtly alter the head angle and steering response—longer shocks may quicken steering, while shorter ones may slow it down. For heavy-duty applications, these shocks are recommended when operating at or near maximum load ratings over half the time, providing extra durability and support.
Before selecting shocks that differ from your OEM length, verify that your wheel travel can accommodate the change without causing clearance issues such as contact between the swingarm, axle, exhaust, or tire. Some shocks are approved for road use, but always consult the latest certification to ensure compliance. With their robust construction and adjustable features, the Progressive Suspension 412 Series shocks are a practical upgrade that enhances ride quality, stability, and style for Harley-Davidson owners seeking reliable performance and customization.
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