Progressive Suspension 412 Series Shock for Harley FLH - 13.5 Inch Standard Black

412 Series Shock - 13.5" - Standard - Black - FLH

The Progressive Suspension 412 Series Shock (Part Number: 412-4073B) is designed specifically for Harley Davidson FLH models, offering a simple yet durable upgrade to enhance your motorcycle's suspension performance. Featuring a five-position cam-style spring load preload adjuster, this shock allows you to easily customize ride stiffness for optimal comfort and handling. Its robust construction ensures long-lasting performance, making it a cost-effective solution for riders seeking reliable suspension improvements.
Made in the USA, the 412 Series Shock is available with various style options, including full show-chrome or black covers, as well as chrome or black springs and end caps, allowing you to match your bike’s aesthetic preferences. The shocks are measured from center-of-eyelet to center-of-eyelet, ensuring compatibility with your Harley FLH model. When installing these shocks on '86-'15 XL models, some modifications or spacing of the chain or belt guard may be necessary to ensure proper clearance. It’s important to verify wheel travel and clearance before installation to prevent contact issues with the swingarm, axle, exhaust, chain/belt guard, or tires.
Depending on your riding style and load requirements, you can choose shocks that are slightly longer or shorter than the stock length to influence steering characteristics: longer shocks may provide quicker steering, while shorter shocks may slow steering for stability. For bikes operated near maximum load capacity more than half the time, Heavy Duty Applications are recommended to ensure durability under demanding conditions. Overall, the Progressive Suspension 412 Series Shock is a versatile upgrade that improves ride quality, handling, and customization for Harley Davidson FLH models, backed by quality American manufacturing.

Features:

• Designed specifically for Harley Davidson FLH models for optimal fit and performance

• Five-position cam-style spring preload adjuster for customizable ride stiffness

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

• Available with various style options including chrome or black covers, springs, and end caps

• Measured from center-of-eyelet to center-of-eyelet for precise compatibility

• Suitable for use on '86-'15 XL models with potential modifications for clearance

• Allows for steering adjustments by selecting shocks slightly longer or shorter than stock

• Heavy Duty Applications recommended for bikes operated near maximum load capacity