PROGRESSIVE SUSPENSION Heavy-Duty Fork Spring Kit — 470 mm length, 39 mm outside diameter, 0.79–1.27 kg/mm – 91-05 Dyna, 88-92 FXR, 15-20 Street, 88-20 Sportster

Upgraded, heavy-duty fork springs designed to deliver a substantial improvement in front-end ride quality for heavier riders or those seeking a firmer, high-performance feel.

The kit includes rate springs combined with preload spacers for straightforward installation and easy setup changes. Expect improved front-end stability, reduced brake dive, and greater comfort and control at speed.

• Heavy-duty spring design reduces bottoming and improves geometry control
• Cost-effective upgrade for a firmer, more controlled ride
• Preload spacers let you fine-tune sag and feel without full disassembly

Simple to install and an economical way to transform fork performance and rider confidence. 🚀