FK-49/80 Fork Spring and Preload System

Add Height and Adjustability to your ride with the FK-49/80 Fork Spring and Preload System from American Suspension.

• Crafted in the USA from high-quality high-tensile spring wire.
• Spring rates, wire diameters and coil lengths developed through real-world testing.
• Closed and ground spring ends for proper seating and true deflection.
• Lifetime warranty against sagging and breakage for the original purchaser.
• Spring preload adjuster caps available in +1”, +2”, or +3” options.
• Fine-tune preload for road conditions and rider weights.
• Kit includes preload adjusters, performance springs and required hardware.

Install: Begin with the preload adjuster screw fully backed out. Set the circlip for approximately 1/4"–1/2" spring compression as the cap begins threading into place. After assembly, adjust static preload to approximately 1/3–1/4 of total travel.