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The Progressive Suspension 412 Series Shock, designed specifically for Harley-Davidson models, offers a reliable and cost-effective upgrade to your motorcycle's suspension system. With a simple yet durable design, these shocks enhance ride comfort and handling while maintaining a sleek appearance. Crafted with quality materials in the USA, the 412 Series is tailored for riders seeking improved performance and longevity. These shocks feature a five-position cam-style spring preload adjuster, allowing precise customization to suit your riding style and load requirements. Whether you're tackling city streets or long highway rides, this adjustability ensures optimal comfort and stability. Some or all shocks listed are approved for road use; always refer to the most recent certification to confirm compliance. The shocks come in multiple style options, including full show-chrome or black covers, as well as chrome or black springs and end caps, enabling you to match your motorcycle's aesthetic preferences. Measuring from center-of-eyelet to center-of-eyelet, these shocks are compatible with a range of Harley models, but installation may require modifications, such as spacing the chain or belt guard on '86-'15 XL models for proper clearance. Slight variations in length—either longer or shorter than stock—can influence steering characteristics, with longer shocks providing quicker steering and shorter ones offering slightly slower response. Heavy-duty applications are recommended for bikes operated at or near maximum load capacity over 50% of the time, ensuring durability under demanding conditions. Before installing shocks that differ from OEM length, verify that wheel travel and clearance are sufficient to prevent contact with exhaust components, swingarm, or tires, maintaining safe operation and optimal performance.
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