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

412 Series Shock - 11" - Standard - Black - FL/FX

The Progressive Suspension 412 Series Shock is designed specifically for Harley-Davidson models, offering a simple yet durable upgrade to your motorcycle's suspension system. With a robust construction and a cost-effective approach, these shocks enhance ride comfort and handling performance. The 412 series features a five-position cam-style spring preload adjuster, enabling riders to easily dial in their preferred ride height and firmness for various loads and riding conditions. This adjustability ensures that whether you're cruising on the highway or tackling uneven terrain, your suspension can be finely tuned for optimal performance.

Made in the USA, the shocks are available with multiple style options, including full show-chrome or black covers, and either chrome or black springs and end caps, allowing customization to match your bike’s aesthetic. All shocks are measured center-of-eyelet to center-of-eyelet, providing consistent sizing for easy installation. When installing on '86-'15 XL models, you may need to modify or space the chain or belt guard to ensure proper clearance, as well as verify that wheel travel can be adjusted without clearance issues such as swingarm or exhaust contact.

These shocks are suitable for heavy-duty applications, especially when your motorcycle operates near the maximum load rating more than half the time. Slight variations in length—either longer or shorter than stock—can influence the head angle and steering responsiveness, with longer shocks providing quicker steering and shorter shocks offering a more relaxed feel. Proper installation and confirmation of clearance are essential to maximize performance and safety. The 412 series shocks are an excellent upgrade for riders seeking improved ride quality, load handling, and customization options for their Harley-Davidson FL/FX models.

Features:

• Designed specifically for Harley-Davidson models, ensuring perfect fit and performance

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

• Multiple style options available, including show-chrome or black covers and springs

• Made in the USA with durable, high-quality materials

• Center-to-center measurement for consistent fit during installation

• Suitable for heavy-duty applications with increased load capacity

• Adjustable length options can influence steering and handling characteristics

• Proper clearance verification required when installing on certain models to avoid contact issues