Heavy Duty Fork Spring Kit. Fits Sportster 2004-2021 with 39mm Fork Tubes & Street 500 2015-2020 with 37mm Fork Tubes

Tech Tips:-

Also Heavy Duty for most 39mm 1987-2003 (XL/FXR/FXD1991-2005)

Check Progressive's search listing if unsure

Features & Benefits:-

* Soaks up small road bumps, yet firm enough to absorb the big ones.

* Helps reduce front end dive during braking,

* Provide excellent ride comfort.

* Rising rate resistance to compression.

* Soft at the start of the travel to offer a "plush" ride, firm at the end of the travel to soak up big bumps.

Tech Tips:-

Proudly Made in the USA by Progressive Suspension !