Progressive Fork Springs — Harley-Davidson

Progressive fork springs use a progressive-rate design to absorb small bumps while resisting front-end dive during braking. Available in Standard and Heavy Duty versions depending on application, with a lifetime manufacturer's warranty.

Features

• Progressive-rate spring design
• Reduces front-end dive during braking
• Available in Standard and Heavy Duty versions
• Precision wound
• Lifetime manufacturer's warranty

Specifications

• Brand: Progressive
• Manufacturer Part #: 11-1578
• Weight: 4.8 lb
• Category: Suspension / Fork Springs
• WARNING: Cancer and Reproductive Harm — California Prop 65. www.P65Warnings.ca.gov

Fitment

Fits Harley-Davidson models. Check your specific year and model to confirm whether Standard or Heavy Duty version is required.

Frequently Asked Questions

What's the difference between Standard and Heavy Duty?

Standard springs work for typical rider weight and load. Heavy Duty versions are stiffer for heavier riders or loaded touring.

Will these reduce the front-end dive under braking?

Yes — the progressive rate resists initial compression, which minimizes dive while still absorbing bumps and providing comfort.

Do these require any special tools to install?

Fork spring replacement requires removal of the fork legs and spring compressor tools. Most riders have a shop handle installation.

Is there a warranty?

Yes — Progressive includes a lifetime manufacturer's warranty on these springs.

California Proposition 65 Warning

WARNING: Cancer and Reproductive Harm — California Prop 65 (Y). www.P65Warnings.ca.gov