Progressive Suspension 412 Series Shock - 11 Inch Standard Black for Harley FL/FX Models (Part #412-4030B)

The Progressive Suspension 412 Series Shock is engineered specifically for Harley-Davidson FL and FX models, providing an affordable upgrade to enhance your motorcycle's suspension performance. Featuring a simple yet durable design, these shocks are built to withstand rigorous riding conditions while offering a cost-effective solution for improved ride quality. The 11-inch length, measured from center-of-eyelet to center-of-eyelet, ensures compatibility with a variety of Harley models, and the black finish offers a sleek, understated look. These shocks incorporate a five-position cam style spring preload adjuster, allowing riders to easily customize ride stiffness to suit their preferences and riding conditions, ensuring optimal comfort and handling. Manufactured in the USA, the PROGRESSIVE SUSPENSION 412 shocks are approved for road use, but it is recommended to verify current certification status before installation. Some models may require modifications, such as spacing the chain or belt guard, particularly on '86-'15 XL models, to ensure proper clearance and avoid contact issues during operation. Depending on your riding style and load capacity, choosing a shock that is slightly longer or shorter than the stock can influence steering dynamics—longer shocks may provide quicker steering, while shorter shocks can result in slightly slower handling. For bikes used at or near their maximum load rating over 50% of the time, Heavy Duty applications are recommended to ensure durability and performance. Before replacing OEM shocks with aftermarket options, confirm that wheel travel and clearance are maintained to prevent interference with exhaust systems, swingarm, axle, or tires, especially when selecting different lengths. Whether you prefer a full show-chrome or black covers, or chrome or black springs and end caps, these shocks offer multiple style options to match your aesthetic preferences. Overall, the PROGRESSIVE SUSPENSION 412 Series Shock delivers reliable performance, easy adjustability, and a sleek appearance, making it a smart upgrade for Harley riders seeking improved suspension quality and ride comfort.

Features:

• Designed specifically for Harley FL/FX models with an 11-inch length for optimal fit and performance

• Five-position cam style spring preload adjuster for easy ride customization

• Made in the USA with durable materials for long-lasting performance

• Available with multiple style options including full show-chrome or black covers, chrome or black springs and end caps

• Approved for road use with certification verification recommended prior to installation

• Compatibility considerations include potential modifications for '86-'15 XL models to ensure proper clearance

• Slight length variations can influence steering dynamics, with longer shocks offering quicker steering and shorter shocks providing slower handling

• Heavy Duty applications recommended for bikes frequently operated near maximum load capacity

• Ensure proper clearance and wheel travel before installing shocks different from OEM length to avoid contact issues