PROGRESSIVE SUSPENSION Fork Springs - '48-'17 XL 11-1578

Stock fork springs compromise between comfort and control—they're soft enough to feel plush initially, but they bottom out under hard braking or rough terrain. Progressive Suspension fork springs solve this problem with a rising-rate design that stays supple during normal riding while firming up progressively as you compress the spring, giving you both the comfort you want and the performance you need. The result is reduced front-end dive during aggressive braking and improved handling over bumps without sacrificing ride quality.

• Fitment: Harley-Davidson XL models, 1948–2017
• MPN: 11-1578
• Spring type: Progressive rate
• Material: High-quality steel
• Installation: Bolt-on replacement
• Benefit: Reduces front-end dive
• Ride quality: Plush initial, firm end-stroke
• Applications: Street riding, performance use