Progressive Suspension 11-1549 Progressive Rate Fork Spring Kit

Progressive Suspension's original progressive rate fork springs are engineered to deliver superior ride quality by absorbing small road bumps while remaining firm enough to handle severe impacts. These springs feature carefully selected spring rates that reduce front-end dive during braking while maintaining excellent ride comfort, backed by a lifetime warranty.

Progressive Rate Advantage:

Unlike straight rate springs that offer only linear resistance, progressive rate springs provide rising rate resistance to compression. A straight rate spring requires the same force to compress each inch of travel—a compromise that sacrifices either comfort or control. Progressive rate springs start soft for a plush ride over minor irregularities, then gradually increase resistance to absorb larger bumps at the end of travel. This design ensures the spring is compliant enough at the start of travel for comfort, yet firm enough at the end to handle aggressive riding and hard braking.

Key Features:

• Progressive rate design optimizes both comfort and performance
• Reduces front-end dive during braking
• Softer initial rate for improved small bump compliance
• Firmer end rate for bottoming resistance
• Lifetime warranty coverage
• Measures 1.48 inch outer diameter by 14.75 inch length

These fork springs replace stock springs to enhance suspension performance without requiring expensive fork cartridge upgrades. Installation requires basic suspension service procedures including fork disassembly, oil drainage, and proper reassembly with fresh fork oil.