Progressive Suspension 04140386 Fork springsRef : PRSU00001A / 04140386

Progressive Suspension – Monotube Cartridge Kit (Manufacturer's Ref: 31-2502)

This monotube cartridge kit transforms a dual-shock fork into a high-performance cartridge fork, without any mechanical modification to the fork. Designed by PROGRESSIVE SUSPENSION, it combines gas monotube cartridges and custom fork springs to refine the front behaviour of the motorcycle and the riding sensations.

• Fork Tube Diameter: 41.00 mm (1.61")
• Style: Monotube
• Height Adjustment: Standard
• Unit: Complete Kit
• Made in the USA
• Lowering kits available: lowers the front by up to 2" (lowering kits not compatible with Low models)

On the road, this kit aims to improve dive resistance during braking, front stability, cornering grip, and bottoming management, while maintaining a sharper and more progressive chassis feel. Installation is designed to remain simple, without machining the fork.

Common compatibilities: particularly suitable for Softail and Fat Boy/Deluxe models from the indicated years (e.g. Harley-Davidson FLSTFBS, FLSS, FLSTN - 2017 models mentioned for reference). Check the reference and fork diameter before ordering.